Bug 2512098 (CVE-2026-73553) - CVE-2026-73553 envoy: envoy: RBAC authorization bypass when path-parameter stripping is enabled
Summary: CVE-2026-73553 envoy: envoy: RBAC authorization bypass when path-parameter st...
Keywords:
Status: NEW
Alias: CVE-2026-73553
Deadline: 2026-08-26
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-06 15:02 UTC by OSIDB Bzimport
Modified: 2026-08-31 16:31 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Description OSIDB Bzimport 2026-08-06 15:02:00 UTC 
An authorization bypass when ignore_path_parameters_in_path_matching was enabled. The router stripped path parameters before selecting a route, while RBAC evaluated the unmodified path. A path such as /admin;x could therefore bypass an RBAC policy for /admin while still reaching the protected route. RBAC path matchers now use the same path-parameter handling as routing.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (7.5)

Embargoed until 2026-08-26 13:00 GMT per Envoy upstream disclosure. PSIRTSUPT-21132.
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