What’s Vulnerable › Vulnerabilities

CVE-2026-22797

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-19 · updated 2026-09-10
• Weakness: CWE-290

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.

Affected products

• OpenStack keystonemiddleware: from 10.5.0 before 10.7.2; from 10.8.0 before 10.9.1; from 10.10.0 before 10.12.1 — fixed in 10.12.1, 10.7.2, 10.9.1

How to fix

Upgrade to a fixed version: OpenStack keystonemiddleware 10.12.1, 10.7.2, 10.9.1. Check the vendor advisory for mitigations.

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

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