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CVE-2025-46821 (GCVE-0-2025-46821)

Vulnerability from cvelistv5 – Published: 2025-05-07 21:24 – Updated: 2025-05-08 14:11
VLAI
Title
Envoy vulnerable to bypass of RBAC uri_template permission
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-08 13:43 UTC
CWE
  • CWE-186 - Overly Restrictive Regular Expression
Assigner
References
Impacted products
Vendor Product Version CPE status
envoyproxy envoy Affected: < 1.31.8
Affected: >= 1.32.0, < 1.32.6
Affected: >= 1.33.0, < 1.33.3
Affected: >= 1.34.0, < 1.34.1
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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