CVE-2026-0707 (GCVE-0-2026-0707)
Vulnerability from cvelistv5 – Published: 2026-01-08 03:41 – Updated: 2026-06-08 10:21
VLAI
EPSS
VEX
Title
Keycloak: keycloak authorization header parsing leading to potential security control bypass
Summary
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)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-08 15:54 UTC
CWE
- CWE-551 - Incorrect Behavior Order: Authorization Before Parsing and Canonicalization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:3947 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:3948 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-0707 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2427768 | issue-trackingx_refsource_REDHAT |
| https://github.com/keycloak/keycloak/issues/49433 |
Impacted products
3 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-12 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
||
| Red Hat | Red Hat build of Keycloak 26.4.10 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
Date Public
2026-01-07 00:00
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