VULNERABILITY INTELLIGENCE
CVE-2026-0976
CVSS score3.7 LOW
EPSS probability0.49%
CISA KEVNot currently listed
Published2026-01-15
Last modified2026-10-22
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Description
A flaw was found in Keycloak. This improper input validation vulnerability occurs because Keycloak accepts RFC-compliant matrix parameters in URL path segments, while common reverse proxy configurations may ignore or mishandle them. A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. This could expose administrative or sensitive endpoints that operators believe are not externally reachable.
Weakness classification
- secalert@redhat.com: CWE-20