CVE-2026-69153 (GCVE-0-2026-69153)
Vulnerability from cvelistv5
Published
2026-08-03 16:56
Modified
2026-08-03 18:28
Severity ?
VLAI Severity ?
EPSS score ?
CWE
Summary
PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map’s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-69153",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-03T18:28:28.771563Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-03T18:28:59.737Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "postcss",
"vendor": "postcss",
"versions": [
{
"status": "affected",
"version": "\u003c 8.5.19"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map\u2019s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-03T16:56:25.733Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp"
},
{
"name": "https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8"
},
{
"name": "https://github.com/postcss/postcss/releases/tag/8.5.19",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/postcss/postcss/releases/tag/8.5.19"
}
],
"source": {
"advisory": "GHSA-fxqj-rqcc-2cmp",
"discovery": "UNKNOWN"
},
"title": "PostCSS: incomplete fix of CVE-2026-45623 \u2014 attacker-controlled sourceMappingURL reads arbitrary .map files when `from` is unset"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-69153",
"datePublished": "2026-08-03T16:56:25.733Z",
"dateReserved": "2026-08-03T15:47:09.654Z",
"dateUpdated": "2026-08-03T18:28:59.737Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-69153\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-03T18:28:28.771563Z\"}}}], \"references\": [{\"url\": \"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-03T18:28:52.676Z\"}}], \"cna\": {\"title\": \"PostCSS: incomplete fix of CVE-2026-45623 \\u2014 attacker-controlled sourceMappingURL reads arbitrary .map files when `from` is unset\", \"source\": {\"advisory\": \"GHSA-fxqj-rqcc-2cmp\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.3, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"LOW\"}}], \"affected\": [{\"vendor\": \"postcss\", \"product\": \"postcss\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 8.5.19\"}]}], \"references\": [{\"url\": \"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp\", \"name\": \"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8\", \"name\": \"https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/postcss/postcss/releases/tag/8.5.19\", \"name\": \"https://github.com/postcss/postcss/releases/tag/8.5.19\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map\\u2019s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-22\", \"description\": \"CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-200\", \"description\": \"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-08-03T16:56:25.733Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-69153\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-03T18:28:59.737Z\", \"dateReserved\": \"2026-08-03T15:47:09.654Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-08-03T16:56:25.733Z\", \"assignerShortName\": \"GitHub_M\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…