Incorrect Behavior Order: Validate Before Canonicalize in Keycloak - CVE-2026-0707
Published: September 5, 2026
Vulnerability identifier: #VU146993
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-0707
CWE-ID: CWE-180
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass authorization checks.
The vulnerability exists due to incorrect behavior order in Keycloak authorization processing when parsing and canonicalizing input. A remote user can submit crafted input to bypass authorization checks.
Affected software
Keycloak
How to mitigate CVE-2026-0707
Install security update from vendor's website.
Keycloak - update to 26.4.12