CVE-2026-0976

LOW EPSS 27.3%

Published Jan 15, 20265mo ago · Modified Jun 17, 20261w ago

3.7 CVSS 3.1

Low

Published Jan 15, 2026 5mo ago

Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score

3.7

Exploitability

2.2

Impact

1.4

Vector string

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction None

Scope Unchanged

Confidentiality Low

Integrity None

Availability None

Threat Intelligence

EPSS Exploit Probability

27.3% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-20 Improper Input Validation Validation

References 2

access.redhat.com https://access.redhat.com/security/cve/CVE-2026-0976
bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2429869

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.