CVE-2026-73553 (GCVE-0-2026-73553)
Vulnerability from cvelistv5
Published
2026-09-21 20:18
Modified
2026-09-22 13:21
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-436 - Interpretation Conflict
Summary
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, When ignore_path_parameters_in_path_matching is enabled, Envoy's router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| envoyproxy | envoy |
Version: < 1.36.10 Version: >= 1.37.0, < 1.37.6 Version: >= 1.38.0, < 1.38.4 Version: >= 1.39.0, < 1.39.1 |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-73553",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-22T13:20:29.312691Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-22T13:21:23.657Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "envoy",
"vendor": "envoyproxy",
"versions": [
{
"status": "affected",
"version": "\u003c 1.36.10"
},
{
"status": "affected",
"version": "\u003e= 1.37.0, \u003c 1.37.6"
},
{
"status": "affected",
"version": "\u003e= 1.38.0, \u003c 1.38.4"
},
{
"status": "affected",
"version": "\u003e= 1.39.0, \u003c 1.39.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, When ignore_path_parameters_in_path_matching is enabled, Envoy\u0027s router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-436",
"description": "CWE-436: Interpretation Conflict",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-21T20:18:47.650Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1"
},
{
"name": "https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.36.10"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.37.6"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.38.4"
},
{
"name": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/envoyproxy/envoy/releases/tag/v1.39.1"
}
],
"source": {
"advisory": "GHSA-77x5-xqjg-hprq",
"discovery": "UNKNOWN"
},
"title": "Envoy: RBAC Authorization Bypass via Path Parameters"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-73553",
"datePublished": "2026-09-21T20:18:47.650Z",
"dateReserved": "2026-08-12T20:53:46.380Z",
"dateUpdated": "2026-09-22T13:21:23.657Z",
"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-2026-73553\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-22T13:20:29.312691Z\"}}}], \"references\": [{\"url\": \"https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-22T13:21:08.907Z\"}}], \"cna\": {\"title\": \"Envoy: RBAC Authorization Bypass via Path Parameters\", \"source\": {\"advisory\": \"GHSA-77x5-xqjg-hprq\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"CHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"envoyproxy\", \"product\": \"envoy\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 1.36.10\"}, {\"status\": \"affected\", \"version\": \"\u003e= 1.37.0, \u003c 1.37.6\"}, {\"status\": \"affected\", \"version\": \"\u003e= 1.38.0, \u003c 1.38.4\"}, {\"status\": \"affected\", \"version\": \"\u003e= 1.39.0, \u003c 1.39.1\"}]}], \"references\": [{\"url\": \"https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq\", \"name\": \"https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprq\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273\", \"name\": \"https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6\", \"name\": \"https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1\", \"name\": \"https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2\", \"name\": \"https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10\", \"name\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.36.10\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6\", \"name\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.37.6\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4\", \"name\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.38.4\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1\", \"name\": \"https://github.com/envoyproxy/envoy/releases/tag/v1.39.1\", \"tags\": [\"x_refsource_MISC\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, When ignore_path_parameters_in_path_matching is enabled, Envoy\u0027s router strips the semicolon suffix before matching but the RBAC url_path matcher evaluates the raw path. A downstream request such as /admin;x can therefore miss a DENY rule for /admin while the router still selects the protected /admin backend. The inconsistent canonicalization allows an unauthenticated client to bypass path-based authorization. The relevant scope boundary is that the route option and a path-based RBAC rule must both be present, and the protected route must match after stripping. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-436\", \"description\": \"CWE-436: Interpretation Conflict\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-09-21T20:18:47.650Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-73553\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-22T13:21:23.657Z\", \"dateReserved\": \"2026-08-12T20:53:46.380Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-09-21T20:18:47.650Z\", \"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…