What’s Vulnerable › Vulnerabilities
CVE-2025-46821: Envoy vulnerable to bypass of RBAC uri_template permission
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-05-07 · updated 2026-06-17
- Weakness: CWE-186
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.
Affected products
- envoyproxy envoy: before 1.31.8; from 1.32.0 before 1.32.6; from 1.33.0 before 1.33.3; 1.34.0 — fixed in 1.31.8, 1.32.6, 1.33.3
How to fix
Upgrade to a fixed version: envoyproxy envoy 1.31.8, 1.32.6, 1.33.3. Check the vendor advisory for mitigations.
References
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