CVE-2026-0976: Red Hat build of Keycloak 26.4.9 (exact versions not specified); +3 more affected products

CVE-2026-0976 affects org.keycloak:keycloak-quarkus-server. CVSS 3.1 base score 3.7 (LOW, Vendor/CNA). EPSS 0.00396 (percentile 0.32613), scored 22-Oct-2026. Affected range: <= 26.2.5.

Affected technology

Red Hat build of Keycloak 26.4.9 · Exact affected versions not specified by the source
Red Hat

Red Hat Build of Keycloak · Exact affected versions not specified by the source
Red Hat

Red Hat JBoss Enterprise Application Platform 8 · Exact affected versions not specified by the source
Red Hat

Red Hat JBoss Enterprise Application Platform Expansion Pack · Exact affected versions not specified by the source
Red Hat

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · No user interaction required

What an attacker can do

A remote attacker can craft requests to mask path segments, potentially bypassing proxy-level path filtering. Vendor/CNA’s CVSS 3.1 assessment (base score 3.7/10) rates confidentiality impact as low; integrity and availability impact as none.

Published 23-Oct-2026 06:11 UTC

CWE: CWE-20
Product: org.keycloak:keycloak-quarkus-server
CCR priority: 14.9 /100 (P5)
CVSS 3.1: 3.7 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N · Vendor/CNA
EPSS: 0.00396 · percentile 0.32613 · 2026-10-22
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-23 06:11:59.600832+00:00 UTC
GitHub Advisory Database · Source record · observed 2026-10-23 07:17:21.678485+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-23 06:11:01.814928+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-0976.html