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CERTFR-2026-AVI-1108
Vulnerability from certfr_avis
De multiples vulnérabilités ont été découvertes dans Curl. Certaines d'entre elles permettent à un attaquant de provoquer une atteinte à la confidentialité des données, une atteinte à l'intégrité des données et un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Curl | cURL et libcurl | Curl versions postérieures ou égales à 7.44.0 et antérieures à 8.22.0 |
References
| Title | Publication Time | Tags | |||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Curl versions post\u00e9rieures ou \u00e9gales \u00e0 7.44.0 et ant\u00e9rieures \u00e0 8.22.0",
"product": {
"name": "cURL et libcurl",
"vendor": {
"name": "Curl",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-80255",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80255"
},
{
"name": "CVE-2026-13608",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-13608"
},
{
"name": "CVE-2026-82208",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-82208"
},
{
"name": "CVE-2026-80230",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80230"
},
{
"name": "CVE-2026-19931",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-19931"
},
{
"name": "CVE-2026-18924",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-18924"
},
{
"name": "CVE-2026-82209",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-82209"
},
{
"name": "CVE-2026-80229",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80229"
},
{
"name": "CVE-2026-80231",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-80231"
}
],
"initial_release_date": "2026-09-02T00:00:00",
"last_revision_date": "2026-09-02T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1108",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-09-02T00:00:00.000000"
}
],
"risks": [
{
"description": "Atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es"
},
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Curl. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es, une atteinte \u00e0 l\u0027int\u00e9grit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Curl",
"vendor_advisories": [
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-82209",
"url": "https://curl.se/docs/CVE-2026-82209.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-19931",
"url": "https://curl.se/docs/CVE-2026-19931.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-18924",
"url": "https://curl.se/docs/CVE-2026-18924.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-80229",
"url": "https://curl.se/docs/CVE-2026-80229.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-80255",
"url": "https://curl.se/docs/CVE-2026-80255.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-13608",
"url": "https://curl.se/docs/CVE-2026-13608.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-80231",
"url": "https://curl.se/docs/CVE-2026-80231.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-82208",
"url": "https://curl.se/docs/CVE-2026-82208.html"
},
{
"published_at": "2026-09-02",
"title": "Bulletin de s\u00e9curit\u00e9 Curl CVE-2026-80230",
"url": "https://curl.se/docs/CVE-2026-80230.html"
}
]
}
CVE-2026-82208 (GCVE-0-2026-82208)
Vulnerability from cvelistv5
Published
2026-09-06 17:49
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-295 - Improper Certificate Validation
Summary
With the wolfSSL backend, when CA caching is enabled and an
`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can
silently reinstall the cached store after the callback returns. A certificate
trusted by the cached store but rejected by the callback-selected store is
then incorrectly accepted.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 8.9.1 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-82208",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-08T18:46:24.528833Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "CWE-295 Improper Certificate Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-08T18:46:41.865Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"lessThan": "8.14.2",
"status": "affected",
"version": "8.9.1",
"versionType": "semver"
},
{
"lessThan": "8.16.1",
"status": "affected",
"version": "8.15.0",
"versionType": "semver"
},
{
"lessThan": "8.20.1",
"status": "affected",
"version": "8.17.0",
"versionType": "semver"
},
{
"lessThan": "8.22.0",
"status": "affected",
"version": "8.21.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
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"status": "affected",
"version": "0f2876b2c33f6784a27b6f7345bd8cd95b46352a",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.21.0"
},
{
"status": "affected",
"version": "8.20.0"
},
{
"status": "affected",
"version": "8.19.0"
},
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
},
{
"status": "affected",
"version": "8.12.1"
},
{
"status": "affected",
"version": "8.12.0"
},
{
"status": "affected",
"version": "8.11.1"
},
{
"status": "affected",
"version": "8.11.0"
},
{
"status": "affected",
"version": "8.10.1"
},
{
"status": "affected",
"version": "8.10.0"
},
{
"status": "affected",
"version": "8.9.1"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Stanislav Fort (Aisle Research)"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Stefan Eissing"
}
],
"descriptions": [
{
"lang": "en",
"value": "With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted."
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-295",
"description": "Improper Certificate Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T06:03:14.795Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
},
"references": [
{
"url": "https://curl.se/docs/CVE-2026-82208.json"
},
{
"url": "https://curl.se/docs/CVE-2026-82208.html"
},
{
"url": "https://hackerone.com/reports/3973090"
}
],
"title": "wolfSSL CA-cache hit overrides callback",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
{
"introduced": "8.9.1"
},
{
"fixed": "8.14.2"
},
{
"introduced": "8.15.0"
},
{
"fixed": "8.16.1"
},
{
"introduced": "8.17.0"
},
{
"fixed": "8.20.1"
},
{
"introduced": "8.21.0"
},
{
"fixed": "8.22.0"
}
],
"type": "SEMVER"
},
{
"events": [
{
"introduced": "0f2876b2c33f6784a27b6f7345bd8cd95b46352a"
},
{
"fixed": "ed0338befd1d865a8ea1fbaa90013a096dedd07a"
}
],
"repo": "https://github.com/curl/curl.git",
"type": "GIT"
}
],
"versions": [
"8.21.0",
"8.20.0",
"8.19.0",
"8.18.0",
"8.17.0",
"8.16.0",
"8.15.0",
"8.14.1",
"8.14.0",
"8.13.0",
"8.12.1",
"8.12.0",
"8.11.1",
"8.11.0",
"8.10.1",
"8.10.0",
"8.9.1"
]
}
],
"aliases": [
"CVE-2026-82208"
],
"credits": [
{
"name": "Stanislav Fort (Aisle Research)",
"type": "finder"
},
{
"name": "Stefan Eissing",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Improper Certificate Validation",
"id": "CWE-295"
},
"URL": "https://curl.se/docs/CVE-2026-82208.json",
"affects": "lib",
"issue": "https://hackerone.com/reports/3973090",
"last_affected": "8.21.0",
"package": "curl",
"severity": "Low",
"www": "https://curl.se/docs/CVE-2026-82208.html"
},
"details": "With the wolfSSL backend, when CA caching is enabled and an\n`CURLOPT_SSL_CTX_FUNCTION` callback replaces the trust store, libcurl can\nsilently reinstall the cached store after the callback returns. A certificate\ntrusted by the cached store but rejected by the callback-selected store is\nthen incorrectly accepted.",
"id": "CURL-CVE-2026-82208",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-09-02T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "wolfSSL CA-cache hit overrides callback"
}
}
},
"cveMetadata": {
"assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"assignerShortName": "curl",
"cveId": "CVE-2026-82208",
"datePublished": "2026-09-06T17:49:16.014Z",
"dateReserved": "2026-08-28T08:25:31.400Z",
"dateUpdated": "2026-09-15T06:03:14.795Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-80229 (GCVE-0-2026-80229)
Vulnerability from cvelistv5
Published
2026-09-06 17:47
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-416 - Use After Free
Summary
When performing transfers via libcurl’s multi interface, pooled TLS
connections can outlive their originating easy handles. In OpenSSL 3 provider
configurations, libcurl attaches an allocated library context to the easy
handle's state and passes it to OpenSSL without acquiring an ownership
reference; destroying the easy handle prematurely frees this context while the
active connection retains a dangling pointer, leading to a heap-use-after-free
upon subsequent I/O or post-handshake operations.
References
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-80229",
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{
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{
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},
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"Technical Impact": "partial"
}
],
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"timestamp": "2026-09-08T15:43:30.858480Z",
"version": "2.0.3"
},
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}
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"problemTypes": [
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{
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"description": "CWE-416 Use After Free",
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}
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],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
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"product": "curl",
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},
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"status": "affected",
"version": "8.17.0",
"versionType": "semver"
},
{
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"status": "affected",
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}
]
},
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},
{
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"version": "8.19.0"
},
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
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},
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}
],
"credits": [
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"type": "finder",
"value": "Stanislav Fort (Aisle Research)"
},
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"type": "remediation developer",
"value": "Daniel Stenberg"
}
],
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}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-15T06:03:08.881Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
"shortName": "curl"
},
"references": [
{
"url": "https://curl.se/docs/CVE-2026-80229.json"
},
{
"url": "https://curl.se/docs/CVE-2026-80229.html"
},
{
"url": "https://hackerone.com/reports/3969255"
}
],
"title": "OpenSSL provider use-after-free",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
{
"introduced": "8.14.0"
},
{
"fixed": "8.14.2"
},
{
"introduced": "8.15.0"
},
{
"fixed": "8.16.1"
},
{
"introduced": "8.17.0"
},
{
"fixed": "8.20.1"
},
{
"introduced": "8.21.0"
},
{
"fixed": "8.22.0"
}
],
"type": "SEMVER"
},
{
"events": [
{
"introduced": "f2ce6c46b9dcc46ced0ce43fa95176ea7599a854"
},
{
"fixed": "7ea37abc6ac0120ba5f6d94be8d196f7cf1506bb"
}
],
"repo": "https://github.com/curl/curl.git",
"type": "GIT"
}
],
"versions": [
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"8.20.0",
"8.19.0",
"8.18.0",
"8.17.0",
"8.16.0",
"8.15.0",
"8.14.1",
"8.14.0"
]
}
],
"aliases": [
"CVE-2026-80229"
],
"credits": [
{
"name": "Stanislav Fort (Aisle Research)",
"type": "finder"
},
{
"name": "Daniel Stenberg",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Use After Free",
"id": "CWE-416"
},
"URL": "https://curl.se/docs/CVE-2026-80229.json",
"affects": "both",
"issue": "https://hackerone.com/reports/3969255",
"last_affected": "8.21.0",
"package": "curl",
"severity": "Low",
"www": "https://curl.se/docs/CVE-2026-80229.html"
},
"details": "When performing transfers via libcurl\u2019s multi interface, pooled TLS\nconnections can outlive their originating easy handles. In OpenSSL 3 provider\nconfigurations, libcurl attaches an allocated library context to the easy\nhandle\u0027s state and passes it to OpenSSL without acquiring an ownership\nreference; destroying the easy handle prematurely frees this context while the\nactive connection retains a dangling pointer, leading to a heap-use-after-free\nupon subsequent I/O or post-handshake operations.",
"id": "CURL-CVE-2026-80229",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-09-02T08:00:00.00Z",
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"summary": "OpenSSL provider use-after-free"
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},
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"dataVersion": "5.2"
}
CVE-2026-13608 (GCVE-0-2026-13608)
Vulnerability from cvelistv5
Published
2026-09-06 17:47
Modified
2026-09-15 06:02
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints
Summary
A flaw in the libcurl SASL negotiation for LDAP authentication allows an
incomplete handshake sequence to be misinterpreted as a successful
cryptographic verification. An attacker executing a Man-in-the-Middle (MITM)
attack can inject a premature or shortcut response that bypasses complete peer
validation.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.82.0 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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{
"status": "affected",
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},
{
"status": "affected",
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},
{
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"version": "8.7.0"
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{
"status": "affected",
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"version": "8.1.0"
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"version": "8.0.1"
},
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"status": "affected",
"version": "7.88.1"
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{
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},
{
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},
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},
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}
],
"title": "OpenLDAP SASL authentication bypass",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
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{
"ranges": [
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},
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}
CVE-2026-80230 (GCVE-0-2026-80230)
Vulnerability from cvelistv5
Published
2026-09-06 17:48
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-295 - Improper Certificate Validation
Summary
When `CURLOPT_PINNEDPUBLICKEY` is configured alongside options that disable
standard peer verification (`CURLOPT_SSL_VERIFYPEER = 0` and
`CURLOPT_SSL_VERIFYHOST = 0`), libcurl fails to enforce public key pinning on
connections established without a presented server certificate. Bypassing the
pinning check under these disabled-verification conditions allows
unauthenticated connections to succeed when they should be rejected.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.45.0 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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},
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},
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},
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},
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{
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},
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},
{
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},
{
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},
{
"status": "affected",
"version": "7.54.0"
},
{
"status": "affected",
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},
{
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},
{
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{
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CVE-2026-80231 (GCVE-0-2026-80231)
Vulnerability from cvelistv5
Published
2026-09-06 17:48
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-488 - Exposure of Data Element to Wrong Session
Summary
A flaw in libcurl makes it wrongly reuse an existing HTTPS connection setup
for a given hostname even when using a different Native CA Store setting
(`CURLSSLOPT_NATIVE_CA`) than when the connection was created.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.71.0 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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CVE-2026-19931 (GCVE-0-2026-19931)
Vulnerability from cvelistv5
Published
2026-09-06 17:47
Modified
2026-09-15 06:02
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-488 - Exposure of Data Element to Wrong Session
Summary
A flaw in libcurl makes it wrongly reuse an HTTP connection setup for a given
hostname using Negotiate authentication, when the initial request is done
using empty credentials. This can make user B's request get sent over user A's
previously authenticated connection.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.64.1 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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CVE-2026-18924 (GCVE-0-2026-18924)
Vulnerability from cvelistv5
Published
2026-09-06 17:47
Modified
2026-09-15 06:02
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-416 - Use After Free
Summary
A flaw in libcurl's handling of HTTP/2 Server Push streams, when the parent
handle is set to share connections with other handles, can lead to
use-after-free in the cleanup process.
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.44.0 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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},
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},
{
"url": "https://curl.se/docs/CVE-2026-18924.html"
},
{
"url": "https://hackerone.com/reports/3916059"
}
],
"title": "HTTP/2 server push UAF",
"x_generator": {
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},
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"affected": [
{
"ranges": [
{
"events": [
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],
"aliases": [
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],
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"type": "finder"
},
{
"name": "Daniel Stenberg",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Use After Free",
"id": "CWE-416"
},
"URL": "https://curl.se/docs/CVE-2026-18924.json",
"affects": "lib",
"issue": "https://hackerone.com/reports/3916059",
"last_affected": "8.21.0",
"package": "curl",
"severity": "Low",
"www": "https://curl.se/docs/CVE-2026-18924.html"
},
"details": "A flaw in libcurl\u0027s handling of HTTP/2 Server Push streams, when the parent\nhandle is set to share connections with other handles, can lead to\nuse-after-free in the cleanup process.",
"id": "CURL-CVE-2026-18924",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-09-02T08:00:00.00Z",
"schema_version": "1.5.0",
"summary": "HTTP/2 server push UAF"
}
}
},
"cveMetadata": {
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"assignerShortName": "curl",
"cveId": "CVE-2026-18924",
"datePublished": "2026-09-06T17:47:27.820Z",
"dateReserved": "2026-08-05T08:31:56.125Z",
"dateUpdated": "2026-09-15T06:02:47.329Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-82209 (GCVE-0-2026-82209)
Vulnerability from cvelistv5
Published
2026-09-06 17:49
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-201 - Information Exposure Through Sent Data
Summary
When libpsl support is enabled, libcurl fails to enforce the Public Suffix
List boundary check when processing a `Set-Cookie` header where the `Domain`
attribute explicitly matches an origin host that is itself a public suffix
(e.g., `Domain=co.uk` set by `co.uk`).
Instead of coercing it into a strict host-only cookie, libcurl saves the
cookie with wildcard domain scope (`.co.uk`). Consequently, the cookie is
inappropriately included in subsequent outbound requests or HTTP redirects to
arbitrary sibling subdomains under the same public suffix (e.g.,
`attacker.co.uk`).
References
Impacted products
| Vendor | Product | Version | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| curl | curl |
Version: 7.46.0 ≤ Version: 8.15.0 ≤ Version: 8.17.0 ≤ Version: 8.21.0 ≤ |
||||||||||||
|
||||||||||||||
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"attackVector": "NETWORK",
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"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "LOW",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
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}
},
{
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"options": [
{
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},
{
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},
{
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},
"references": [
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"tags": [
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],
"url": "https://hackerone.com/reports/3972385"
}
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"status": "affected",
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{
"status": "affected",
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},
{
"status": "affected",
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},
{
"status": "affected",
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{
"status": "affected",
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},
{
"status": "affected",
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{
"status": "affected",
"version": "7.50.3"
},
{
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{
"url": "https://curl.se/docs/CVE-2026-82209.html"
},
{
"url": "https://hackerone.com/reports/3972385"
}
],
"title": "domain-scoped PSL domain cookie",
"x_generator": {
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},
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"id": "CURL-CVE-2026-82209",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-09-02T08:00:00.00Z",
"schema_version": "1.5.0",
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"cveId": "CVE-2026-82209",
"datePublished": "2026-09-06T17:49:35.050Z",
"dateReserved": "2026-08-28T08:25:48.340Z",
"dateUpdated": "2026-09-15T06:03:16.294Z",
"state": "PUBLISHED"
},
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}
CVE-2026-80255 (GCVE-0-2026-80255)
Vulnerability from cvelistv5
Published
2026-09-06 17:48
Modified
2026-09-15 06:03
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-201 - Information Exposure Through Sent Data
Summary
A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of
space (ascii code 32) immediately before the `Secure` attribute causes curl to
store the cookie without its Secure flag. The cookie might then wrongfully be
sent over plaintext HTTP on subsequent requests to the same host.
References
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
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{
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}
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"timestamp": "2026-09-08T18:45:09.883106Z",
"version": "2.0.3"
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"references": [
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"url": "https://hackerone.com/reports/3972395"
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"title": "CISA ADP Vulnrichment"
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},
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"status": "affected",
"version": "8.17.0",
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"type": "finder",
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],
"descriptions": [
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"lang": "en",
"value": "A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of\nspace (ascii code 32) immediately before the `Secure` attribute causes curl to\nstore the cookie without its Secure flag. The cookie might then wrongfully be\nsent over plaintext HTTP on subsequent requests to the same host."
}
],
"problemTypes": [
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{
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"description": "Information Exposure Through Sent Data",
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"providerMetadata": {
"dateUpdated": "2026-09-15T06:03:13.400Z",
"orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
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{
"url": "https://curl.se/docs/CVE-2026-80255.json"
},
{
"url": "https://curl.se/docs/CVE-2026-80255.html"
},
{
"url": "https://hackerone.com/reports/3972395"
}
],
"title": "secure cookie attribute bypass with tab",
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_osv": {
"affected": [
{
"ranges": [
{
"events": [
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"introduced": "8.13.0"
},
{
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},
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},
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},
{
"introduced": "8.17.0"
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"repo": "https://github.com/curl/curl.git",
"type": "GIT"
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"8.19.0",
"8.18.0",
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"8.14.1",
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}
],
"aliases": [
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"name": "Stanislav Fort (Aisle Research)",
"type": "finder"
},
{
"name": "Daniel Stenberg",
"type": "remediation developer"
}
],
"database_specific": {
"CWE": {
"desc": "Information Exposure Through Sent Data",
"id": "CWE-201"
},
"URL": "https://curl.se/docs/CVE-2026-80255.json",
"affects": "both",
"issue": "https://hackerone.com/reports/3972395",
"last_affected": "8.21.0",
"package": "curl",
"severity": "Low",
"www": "https://curl.se/docs/CVE-2026-80255.html"
},
"details": "A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of\nspace (ascii code 32) immediately before the `Secure` attribute causes curl to\nstore the cookie without its Secure flag. The cookie might then wrongfully be\nsent over plaintext HTTP on subsequent requests to the same host.",
"id": "CURL-CVE-2026-80255",
"modified": "2026-09-07T10:34:51.00Z",
"published": "2026-09-02T08:00:00.00Z",
"schema_version": "1.5.0",
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}
}
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"cveId": "CVE-2026-80255",
"datePublished": "2026-09-06T17:48:54.275Z",
"dateReserved": "2026-08-26T06:25:58.220Z",
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"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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