CVE-2026-0707 – Keycloak: keycloak authorization header parsing leading to potential security control bypass

CVE ID : CVE-2026-0707

Published : Jan. 8, 2026, 3:41 a.m. | 46 minutes ago

Description : A flaw was found in Keycloak. The Keycloak Authorization header parser is overly permissive regarding the formatting of the “Bearer” authentication scheme. It accepts non-standard characters (such as tabs) as separators and tolerates case variations that deviate from RFC 6750 specifications.

Severity: 5.3 | MEDIUM

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