CVE-2026-73553Envoy: RBAC Authorization Bypass via Path Parameters
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
- Weakness (CWE)
- CWE-436
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
envoyproxy envoy envoyproxy:envoy (from the name) | before 1.36.10; from 1.37.0, < 1.37.6; from 1.38.0, < 1.38.4; from 1.39.0, < 1.39.1 | CNA record |
envoyproxy envoy envoyproxy:envoy | before 1.36.10; from 1.37.0 before 1.37.6; from 1.38.0 before 1.38.4; from 1.39.0 before 1.39.1 | NVD |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-77x5-xqjg-hprqx-refsource-confirm, exploit, vendor-advisory, mitigation
- https://github.com/envoyproxy/envoy/commit/0be4a0302ea94a894e470817c2edfbd5ed90d273x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/6a703a375a20e3bf98140ee5f5522c614adee7b6x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/b6ec9b66cc33a415e2fa81a6fa8363cac4772dd1x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/commit/e6d5fe885409ebb335ed3934a167f0bcfea471f2x-refsource-misc, patch
- https://github.com/envoyproxy/envoy/releases/tag/v1.36.10x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.37.6x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.38.4x-refsource-misc, release-notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.39.1x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.