CVE-2026-22797

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-01-19. a secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.9
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.9Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
43.9%
KEV
Not listed

Published

January 19, 2026

Last Modified

July 22, 2026

Advisory Details (10)

Auto-updated Jul 23, 2026
Patch available. Sources: redhat.
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:5133
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:4434
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:3855
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:3402
generic

oss-security - [OSSA-2026-001] OpenStack keystonemiddleware: Privilege Escalation via Identity Headers in External OAuth2 Tokens (CVE-2026-22797) errata 1

http://www.openwall.com/lists/oss-security/2026/01/16/9
generic

oss-security - Re: [CVE-2026-22797] OpenStack keystonemiddleware: Privilege Escalation via Identity Headers in External OAuth2 Tokens (CVE-2026-22797)

http://www.openwall.com/lists/oss-security/2026/01/16/3
generic

oss-security - Re: [CVE-2026-22797] OpenStack keystonemiddleware: Privilege Escalation via Identity Headers in External OAuth2 Tokens (CVE-2026-22797)

http://www.openwall.com/lists/oss-security/2026/01/16/2
generic

oss-security - [CVE-2026-22797] OpenStack keystonemiddleware: Privilege Escalation via Identity Headers in External OAuth2 Tokens (CVE-2026-22797)

http://www.openwall.com/lists/oss-security/2026/01/15/1
generic

oss-security - [OSSA-2026-001] OpenStack keystonemiddleware: Privilege Escalation via Identity Headers in External OAuth2 Tokens (CVE-2026-22797) errata 1

https://www.openwall.com/lists/oss-security/2026/01/16/9
generic

Bug #2129018 “[OSSA-2026-001] Privilege Escalation via Identity ...” : Bugs : keystonemiddleware

https://launchpad.net/bugs/2129018

Vendor Advisories for CVE-2026-22797(6)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(6)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-keystonemiddleware (10.12.0-0ubuntu1.1) @ questing2026-05-20ubuntu
redhatopenshift4/ose-ironic-rhel9:sha256:29871a94fc618bf280a7c38280ec0642c766838bac34a9ace503378a67f4638d2026-04-01redhat
redhatopenshift4/ose-ironic-rhel9:sha256:5790d9114681ad940a65723e23bed39b2f5eac1dbde017f368861222058064e82026-03-25redhat
redhatopenshift4/ose-ironic-rhel9:sha256:64f69dda395c7912c23def5367853f2f34ad32581a76785202d864ae99c562192026-03-18redhat
redhatopenshift4/ose-ironic-rhel9:sha256:7e57a906f55fdc4522dd130c76942999c5c28f469579dcdda2e78949a860b8f82026-03-11redhat
redhatopenshift4/ose-ironic-rhel9:sha256:1d1766c76d70f3378b45f9065e5576251f3fee3d56ee379a9c55af86e1e70c442026-03-03redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 52× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-07-23 14:18 UTCEPSS rescore
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  3. 2026-07-23 03:06 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-22797?
CVE-2026-22797 is a critical vulnerability published on January 19, 2026. 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 externaloauth2token middleware fails to sanitize incoming authentication headers before processing OAuth 2.0 tokens. By sending forged…
When was CVE-2026-22797 disclosed?
CVE-2026-22797 was first published in the National Vulnerability Database on January 19, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22797 actively exploited?
CVE-2026-22797 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-22797?
CVE-2026-22797 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-22797?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22797, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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