What is the CVSS score of CVE-2026-0976?

CVE-2026-0976 has a CVSS 3.1 base score of 3.7 (Low). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Keycloak. This are affected by CVE-2026-0976?

CVE-2026-0976 is a low-severity vulnerability in A flaw involving input validation (CVSS 3.7).

How to fix or mitigate CVE-2026-0976?

During next maintenance window: Apply vendor patches when convenient. Verify input validation controls are in place.

Keycloak. This CVE-2026-0976

LOW

Improper Input Validation (CWE-20)

2026-01-15 secalert@redhat.com

GHSA-v897-pv23-r8cw

Code Injection

3.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

3.7 LOW

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Jan 15, 2026 - 13:16 nvd

LOW 3.7

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

19 maven packages depend on org.keycloak:keycloak-quarkus-server (4 direct, 15 indirect)

Ecosystem-wide dependent count for version 26.2.5.

DescriptionCVE.org

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.

AnalysisAI

Technical ContextAI

Classified as CWE-20 (Improper Input Validation). 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.