SB2025120344 - Bypass of RBAC uri_template permissions in Envoy
Published: December 3, 2025
Security Bulletin ID
SB2025120344
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect Regular Expression (CVE-ID: CVE-2025-46821)
CWE-ID: CWE-185 - Incorrect Regular Expression
CVSSv4: 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
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 update from vendor's website.