CVE-2026-22797

Publication date 19 January 2026

Last updated 21 January 2026

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
python-keystonemiddleware	25.10 questing	Vulnerable
	24.04 LTS noble	Vulnerable
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected

Notes

mdeslaur

Introduced in 10.5.0 with: https://github.com/openstack/keystonemiddleware/commit/de15a610e160defb367b224258498727384d10a8

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
python-keystonemiddleware	Upstream: https://review.opendev.org/973496 Upstream: 9401c51 Upstream: https://review.opendev.org/c/openstack/keystonemiddleware/+/973495 Upstream: a44297c

Severity score breakdown

Parameter	Value
Base score	9.9 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Changed
Confidentiality	High
Integrity impact	High
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L