CVE-2026-0707
MEDIUMKeycloak - Authorization Bypass via Non-Standard Bearer Token Parsing
Title source: llmDescription
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.
References (4)
Core 4
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3947
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3948
Vendor Advisory vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-0707
Issue Tracking issue-tracking
x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2427768
Scores
CVSS v3
5.3
EPSS
0.0003
EPSS Percentile
9.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-551
Status
published
Products (4)
org.keycloak/keycloak-parent
0Maven
Red Hat/Red Hat build of Keycloak 26.4
26.4-12
Red Hat/Red Hat build of Keycloak 26.4
26.4.10-1
Red Hat/Red Hat build of Keycloak 26.4.10
Published
Jan 08, 2026
Tracked Since
Feb 18, 2026