github.comConfirmation
https://github.com/envoyproxy/envoy/security/advisories/GHSA-c7cm-838g-6g67 CVE-2025-46821
MEDIUM
Envoy vulnerable to bypass of RBAC uri_template permission
Record summary
CVE-2025-46821 has a selected CVSS score of 5.3 (medium).
Description
Envoy is a cloud-native edge/middle/service proxy. Prior to versions 1.34.1, 1.33.3, 1.32.6, and 1.31.8, Envoy's URI template matcher incorrectly excludes the `*` character from a set of valid characters in the URI path. As a result URI path containing the `*` character will not match a URI template expressions. This can result in bypass of RBAC rules when configured using the `uri_template` permissions. This vulnerability is fixed in Envoy versions v1.34.1, v1.33.3, v1.32.6, v1.31.8. As a workaround, configure additional RBAC permissions using `url_path` with `safe_regex` expression.
Description source: CVE List
Exploitation context
CISA SSVC decision
ExploitationNone
AutomatableYes
Technical impactPartial
CISA Coordinator · SSVC 2.0.3 · Evaluated May 8, 2025 · Source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
| CVE List | < 1.31.8 | affected | |
| >= 1.32.0, < 1.32.6 | affected | ||
| >= 1.33.0, < 1.33.3 | affected | ||
| >= 1.34.0, < 1.34.1 | affected |