SB2026020377 - Ubuntu update for python-keystonemiddleware
Published: February 3, 2026
Security Bulletin ID
SB2026020377
CSH 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 vulnerability.
1) Improper authorization (CVE-ID: CVE-2026-22797)
CWE-ID: CWE-285 - Improper Authorization
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
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.