Bug 2512098 (CVE-2026-73553)

Summary:	CVE-2026-73553 envoy: envoy: RBAC authorization bypass when path-parameter stripping is enabled
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	kaycoth, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Deadline:	2026-08-26

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.