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9.9
CRITICAL CVSS 3.1
CVE-2026-22797
OpenStack Keystone Middleware OAuth 2.0 Token Forgery Privilege Escalation
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.

INFO

Published Date :

Jan. 19, 2026, 6:16 p.m.

Last Modified :

Jan. 26, 2026, 3:05 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2026-22797 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Openstack keystonemiddleware
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 CRITICAL [email protected]
CVSS 3.1 CRITICAL MITRE-CVE
Solution
Apply patches to the OpenStack keystonemiddleware to sanitize authentication headers.
  • Update keystonemiddleware to a version addressing the header sanitization.
  • Ensure the external_oauth2_token middleware is configured correctly.
  • Review and restrict incoming authentication header processing.
  • Monitor for unauthorized privilege escalations.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-22797.

URL Resource
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-22797 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-22797 weaknesses.

CAPEC-21: Exploitation of Trusted Identifiers Exploitation of Trusted Identifiers CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-60: Reusing Session IDs (aka Session Replay) Reusing Session IDs (aka Session Replay) CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM) CAPEC-459: Creating a Rogue Certification Authority Certificate Creating a Rogue Certification Authority Certificate CAPEC-461: Web Services API Signature Forgery Leveraging Hash Function Extension Weakness Web Services API Signature Forgery Leveraging Hash Function Extension Weakness CAPEC-473: Signature Spoof Signature Spoof CAPEC-476: Signature Spoofing by Misrepresentation Signature Spoofing by Misrepresentation CAPEC-667: Bluetooth Impersonation AttackS (BIAS) Bluetooth Impersonation AttackS (BIAS)

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-22797 vulnerability anywhere in the article.

  • Daily CyberSecurity
Total Takeover: Critical CVSS 10 Flaw Found in Oracle Fusion Middleware

Oracle has kicked off 2026 with a massive security overhaul, releasing its first Critical Patch Update (CPU) of the year to address a perfect storm of vulnerabilities. Leading the pack is a maximum-se ... Read more

Published Date: Jan 21, 2026 (2 weeks, 4 days ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-22797 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Jan. 19, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/01/15/1
    Added Reference http://www.openwall.com/lists/oss-security/2026/01/16/2
    Added Reference http://www.openwall.com/lists/oss-security/2026/01/16/3
    Added Reference http://www.openwall.com/lists/oss-security/2026/01/16/9
  • New CVE Received by [email protected]

    Jan. 19, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:L
    Added CWE CWE-290
    Added Reference https://launchpad.net/bugs/2129018
    Added Reference https://www.openwall.com/lists/oss-security/2026/01/16/9
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.9
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact