SB2026011931 - Privilege escalation via external OAuth2 tokens in OpenStack Keystone middleware
Published: January 19, 2026
Security Bulletin ID
SB2026011931
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper authorization (CVE-ID: CVE-2026-22797)
The vulnerability allows a remote user to escalate privileges within the application.
The vulnerability exists due to missing authorization checks in the external_oauth2_token middleware. A remote authenticated user can send forged identity headers such as X-Is-Admin-Project, X-Roles, or X-User-Id and escalate privileges within the application.
Remediation
Install update from vendor's website.