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Unrated severityNVD Advisory· Published May 7, 2025· Updated May 8, 2025

Envoy vulnerable to bypass of RBAC uri_template permission

CVE-2025-46821

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.

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Affected products

3
  • Envoyproxy/Envoyllm-fuzzy2 versions
    <1.31.8; >=1.32.0 <1.32.6; >=1.33.0 <1.33.3; >=1.34.0 <1.34.1+ 1 more
    • (no CPE)range: <1.31.8; >=1.32.0 <1.32.6; >=1.33.0 <1.33.3; >=1.34.0 <1.34.1
    • (no CPE)range: < 1.31.8
  • osv-coords
    pkg:bitnami/envoy
    Range: < 1.31.8

Patches

Vulnerability mechanics

References

1

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