CVE-2026-0707
MEDIUM5.3EPSS 0.03%Keycloak has Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Published: 1/8/2026Modified: 3/5/2026
Also known as:GHSA-gv94-wp4h-vv8p
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.
Affected packages (1)
- Maven/org.keycloak:keycloak-parentfrom 0, <= 26.5.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
References (6)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-0707
- PATCHhttps://github.com/keycloak/keycloak
- WEBhttps://access.redhat.com/errata/RHSA-2026:3947
- WEBhttps://access.redhat.com/errata/RHSA-2026:3948
- WEBhttps://access.redhat.com/security/cve/CVE-2026-0707
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=2427768