CVE-2026-22797
python-keystonemiddleware - security update
9.9
CRITICAL
CVSS 3.1
EPSS 0.17%
Description
An issue was discovered in OpenStack keystonemiddleware 10.5 through 10.7 before 10.7.2, 10.8 and 10.9 before 10.9.1, and 10.10 through 10.12 before 10.12.1. The external_oauth2_token middleware fails to sanitize incoming authentication headers before processing OAuth 2.0 tokens. By sending forged identity headers such as X-Is-Admin-Project, X-Roles, or X-User-Id, an authenticated attacker may escalate privileges or impersonate other users. All deployments using the external_oauth2_token middleware are affected.
How to fix CVE-2026-22797
To remediate CVE-2026-22797, upgrade the affected package to a fixed version below.
- —upgrade to 10.9.0-2+deb13u1 or later
- —upgrade to 10.9.0-2+deb13u1 or later
Is CVE-2026-22797 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 10.9.0-2+deb13u1
- from 0, < 10.9.0-2+deb13u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.9 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L |