CVE-2026-0707 MEDIUM

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

Vendor Red Hat
Product Red Hat build of Keycloak 26.4.10
Weakness CWE-551
Published January 8, 2026
Last update June 8, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 8, 2026 CVE published
June 8, 2026 Record updated