Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:3947
- https://access.redhat.com/errata/RHSA-2026:3948
- https://access.redhat.com/security/cve/CVE-2026-0707
- https://bugzilla.redhat.com/show_bug.cgi?id=2427768
FAQ
What is CVE-2026-0707?
CVE-2026-0707 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 ...
How severe is CVE-2026-0707?
CVE-2026-0707 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0707?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.