CVE-2026-22797
Medium
Elevated severity or exploit probability.
CVSS base
9.9
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
EPSS — probability of exploitation (30 days)
0.7%
49.4th percentile
CISA KEV
Not listed
Weakness / dates
CWE-290
Published 2026-01-19 · modified 2026-09-10
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.
References
- https://launchpad.net/bugs/2129018
- https://www.openwall.com/lists/oss-security/2026/01/16/9
- http://www.openwall.com/lists/oss-security/2026/01/15/1
- http://www.openwall.com/lists/oss-security/2026/01/16/2
- http://www.openwall.com/lists/oss-security/2026/01/16/3
- http://www.openwall.com/lists/oss-security/2026/01/16/9
- https://access.redhat.com/errata/RHSA-2026:3402
- https://access.redhat.com/errata/RHSA-2026:3855
- https://access.redhat.com/errata/RHSA-2026:4434
- https://access.redhat.com/errata/RHSA-2026:5133
- https://access.redhat.com/errata/RHSA-2026:5907
- https://access.redhat.com/security/cve/CVE-2026-22797
- https://bugzilla.redhat.com/show_bug.cgi?id=2430879
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22797.json