SB2026090614 - Security restrictions bypass in Keycloak
Published: September 6, 2026
Security Bulletin ID
SB2026090614
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect Behavior Order: Validate Before Canonicalize (CVE-ID: CVE-2026-0707)
CWE-ID: CWE-180 - Incorrect Behavior Order: Validate Before Canonicalize
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.