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
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.9Exploit: None knownExposed: 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 PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

January 19, 2026

Last Modified

September 10, 2026

Advisory Details (10)

Auto-updated Sep 17, 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) @ questing2026-09-10ubuntu
redhatopenshift4/ose-ironic-rhel9:17742660982026-04-01redhat
redhatopenshift4/ose-ironic-rhel9:17731380632026-03-25redhat
redhatopenshift4/ose-ironic-rhel9:17724770452026-03-18redhat
redhatopenshift4/ose-ironic-rhel9:17721767492026-03-11redhat
redhatopenshift4/ose-ironic-rhel9:17720296262026-03-03redhat

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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-keystonemiddleware10.9.0-210.9.0-2+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-keystonemiddleware10.12.0-1, 10.12.0-2, 10.9.0-210.12.0-3—

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 4× in last 7d / 53× 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 287 total refreshes for this CVE.

  1. 2026-09-18 19:27 UTCEPSS rescore
  2. 2026-09-16 14:07 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-13 16:47 UTCEPSS rescore
  5. 2026-09-12 15:01 UTCEPSS rescore
  6. 2026-09-11 14:52 UTCEPSS rescore
  7. 2026-09-10 13:23 UTCEG score recompute
  8. 2026-09-10 13:23 UTCVendor advisory
  9. 2026-09-10 13:23 UTCGHSA enrichment
  10. 2026-09-10 12:29 UTCEG score recompute
  11. 2026-09-10 12:29 UTCVendor advisory
  12. 2026-09-10 12:29 UTCGHSA enrichment
  13. 2026-09-10 09:34 UTCEPSS rescore
  14. 2026-09-09 12:41 UTCEG score recompute
  15. 2026-09-09 12:41 UTCVendor advisory
  16. 2026-09-09 12:41 UTCGHSA enrichment
  17. 2026-09-08 22:00 UTCEPSS rescore
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-07 14:06 UTCEG score recompute
  20. 2026-09-07 14:06 UTCVendor advisory
  21. 2026-09-07 14:06 UTCGHSA enrichment
  22. 2026-09-06 13:47 UTCEPSS rescore
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-04 05:06 UTCEPSS rescore
  25. 2026-09-02 14:11 UTCEPSS rescore
Show 75 more
  1. 2026-09-01 13:53 UTCEPSS rescore
  2. 2026-09-01 04:39 UTCEPSS rescore
  3. 2026-08-30 19:17 UTCEPSS rescore
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:41 UTCEPSS rescore
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-26 16:12 UTCEG score recompute
  8. 2026-08-26 16:12 UTCVendor advisory
  9. 2026-08-26 16:12 UTCGHSA enrichment
  10. 2026-08-26 14:46 UTCEPSS rescore
  11. 2026-08-26 12:23 UTCEG score recompute
  12. 2026-08-26 12:23 UTCVendor advisory
  13. 2026-08-26 12:23 UTCGHSA enrichment
  14. 2026-08-25 13:48 UTCEPSS rescore
  15. 2026-08-25 13:26 UTCEG score recompute
  16. 2026-08-25 13:26 UTCVendor advisory
  17. 2026-08-25 13:26 UTCGHSA enrichment
  18. 2026-08-25 12:22 UTCEG score recompute
  19. 2026-08-25 12:22 UTCVendor advisory
  20. 2026-08-25 12:22 UTCGHSA enrichment
  21. 2026-08-24 13:32 UTCEG score recompute
  22. 2026-08-24 13:32 UTCVendor advisory
  23. 2026-08-24 13:32 UTCGHSA enrichment
  24. 2026-08-24 12:28 UTCEG score recompute
  25. 2026-08-24 12:28 UTCVendor advisory
  26. 2026-08-24 12:28 UTCGHSA enrichment
  27. 2026-08-23 00:19 UTCEPSS rescore
  28. 2026-08-21 23:49 UTCEPSS rescore
  29. 2026-08-20 22:55 UTCEPSS rescore
  30. 2026-08-20 13:59 UTCEG score recompute
  31. 2026-08-20 13:59 UTCVendor advisory
  32. 2026-08-20 13:59 UTCGHSA enrichment
  33. 2026-08-20 12:46 UTCEG score recompute
  34. 2026-08-20 12:46 UTCVendor advisory
  35. 2026-08-20 12:46 UTCGHSA enrichment
  36. 2026-08-19 17:03 UTCEPSS rescore
  37. 2026-08-19 12:12 UTCEG score recompute
  38. 2026-08-19 12:12 UTCVendor advisory
  39. 2026-08-19 12:12 UTCGHSA enrichment
  40. 2026-08-18 13:48 UTCEPSS rescore
  41. 2026-08-18 12:24 UTCEG score recompute
  42. 2026-08-18 12:24 UTCVendor advisory
  43. 2026-08-18 12:23 UTCGHSA enrichment
  44. 2026-08-17 13:47 UTCEPSS rescore
  45. 2026-08-17 12:22 UTCEG score recompute
  46. 2026-08-17 12:22 UTCVendor advisory
  47. 2026-08-17 12:22 UTCGHSA enrichment
  48. 2026-08-17 12:14 UTCEG score recompute
  49. 2026-08-17 12:14 UTCVendor advisory
  50. 2026-08-17 12:14 UTCGHSA enrichment
  51. 2026-08-16 14:56 UTCEPSS rescore
  52. 2026-08-16 02:14 UTCEPSS rescore
  53. 2026-08-15 01:30 UTCEPSS rescore
  54. 2026-08-14 23:23 UTCVendor advisory
  55. 2026-08-14 23:23 UTCGHSA enrichment
  56. 2026-08-14 13:44 UTCEG score recompute
  57. 2026-08-14 13:44 UTCVendor advisory
  58. 2026-08-14 13:44 UTCGHSA enrichment
  59. 2026-08-13 22:00 UTCEPSS rescore
  60. 2026-08-12 13:50 UTCEPSS rescore
  61. 2026-08-11 13:42 UTCEPSS rescore
  62. 2026-08-11 13:24 UTCEG score recompute
  63. 2026-08-11 13:24 UTCVendor advisory
  64. 2026-08-11 13:24 UTCGHSA enrichment
  65. 2026-08-11 12:25 UTCEG score recompute
  66. 2026-08-11 12:25 UTCVendor advisory
  67. 2026-08-11 12:25 UTCGHSA enrichment
  68. 2026-08-11 00:00 UTCEPSS rescore
  69. 2026-08-10 13:22 UTCEG score recompute
  70. 2026-08-10 13:22 UTCVendor advisory
  71. 2026-08-10 13:22 UTCGHSA enrichment
  72. 2026-08-10 12:28 UTCEG score recompute
  73. 2026-08-10 12:28 UTCVendor advisory
  74. 2026-08-10 12:28 UTCGHSA enrichment
  75. 2026-08-09 23:37 UTCVendor advisory

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 September 10, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 49.9% of all scored CVEs.
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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