CVE-2026-0976

low Red Hat
CVSS v3 Base Score
3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS Score
0.0%
Exploitation probability in 30 days
Top 98% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Published: January 15, 2026 (120 days ago)
Last Modified: January 15, 2026
Vendor: Red Hat

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.

CWE

CWE-20

Affected Products

Red Hat Build of KeycloakRed Hat JBoss Enterprise Application Platform 8Red Hat JBoss Enterprise Application Platform Expansion Pack

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov