#VU119109 Incorrect Regular Expression in envoy - CVE-2025-46821

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Main Vulnerability Database Vulnerabilities #VU119109

#VU119109 Incorrect Regular Expression in envoy - CVE-2025-46821

Published: December 3, 2025


Vulnerability identifier: #VU119109
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2025-46821
CWE-ID: CWE-185
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
envoy
Software vendor:
Cloud Native Computing Foundation

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient input validation within the template matcher that incorrectly excludes the "*" character from a set of valid characters in the URI path. A remote attacker can bypass RBAC rules when configured using the uri_template permissions.


Remediation

Install updates from vendor's website.

External links