CVE-2026-44394

HIGHNVD 8.16.0▼
EchelonGraph scoreMEDIUM confidence

Score 6.0 from GitHub Security Advisory published 2026-05-28. NVD baseline CVSS 8.1; sources differ by 2.1.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone federated token rescoping mechanism does not propagate the original token's expiry to the newly issued token. When a federated user rescopes a token via POST /v3/auth/tokens, the handle_scoped_token() function in the mapped authentication plugin returns response data without an expires_at value. The token provider falls back to issuing a token with a fresh default TTL. By rescoping repeatedly before each token expires, a user can maintain access indefinitely, bypassing operator-configured token lifetime policies. This is a variant of CVE-2012-3426. Only deployments using federated identity (SAML2, OpenID Connect) are affected.

CVSS v3
8.1
EG Score
6.0(medium)
EPSS
16.2%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 2, 2026

Advisory Details (2)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

OSSA-2026-015: Multiple credential delegation and authorization bypass vulnerabilities in Keystone — OpenStack Security Advisories 0.0.1.dev342 documentation

https://security.openstack.org/ossa/OSSA-2026-015.html
generic

Bug #2150379 “[OSSA-2026-015] Authentication Expiry Bypass via F...” : Bugs : OpenStack Identity (keystone)

https://bugs.launchpad.net/keystone/+bug/2150379

Vendor Advisories for CVE-2026-44394(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-keystone (2:29.0.0-0ubuntu1.2) @ resolute2026-07-11ubuntu

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

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
keystone14.0.0 ... 27.0.1 (50 versions)27.0.2—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 64× 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 126 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
  4. 2026-07-13 06:13 UTCEPSS rescore
  5. 2026-07-12 05:46 UTCEPSS rescore
  6. 2026-07-11 22:35 UTCEG score recompute
  7. 2026-07-11 22:35 UTCVendor advisory
  8. 2026-07-11 08:27 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-08 22:50 UTCEG score recompute
  11. 2026-07-08 22:50 UTCVendor advisory
  12. 2026-07-08 15:16 UTCEPSS rescore
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-06 16:27 UTCEPSS rescore
  15. 2026-07-06 02:23 UTCEPSS rescore
  16. 2026-07-05 02:30 UTCEPSS rescore
  17. 2026-07-02 23:32 UTCEG score recompute
  18. 2026-07-02 23:32 UTCVendor advisory
  19. 2026-07-01 15:07 UTCEPSS rescore
  20. 2026-07-01 03:47 UTCEG score recompute
  21. 2026-07-01 03:47 UTCVendor advisory
  22. 2026-07-01 03:47 UTCGHSA enrichment
  23. 2026-06-30 23:22 UTCEPSS rescore
  24. 2026-06-29 19:46 UTCEG score recompute
  25. 2026-06-29 19:46 UTCVendor advisory
Show 75 more
  1. 2026-06-29 19:46 UTCGHSA enrichment
  2. 2026-06-29 14:06 UTCEPSS rescore
  3. 2026-06-28 18:48 UTCEG score recompute
  4. 2026-06-28 18:48 UTCVendor advisory
  5. 2026-06-28 18:48 UTCGHSA enrichment
  6. 2026-06-28 14:07 UTCEPSS rescore
  7. 2026-06-28 04:56 UTCEPSS rescore
  8. 2026-06-27 19:30 UTCEG score recompute
  9. 2026-06-27 19:30 UTCVendor advisory
  10. 2026-06-27 19:29 UTCGHSA enrichment
  11. 2026-06-27 03:08 UTCEPSS rescore
  12. 2026-06-26 20:42 UTCEG score recompute
  13. 2026-06-26 20:42 UTCVendor advisory
  14. 2026-06-26 20:42 UTCGHSA enrichment
  15. 2026-06-25 21:57 UTCEG score recompute
  16. 2026-06-25 21:57 UTCVendor advisory
  17. 2026-06-25 21:57 UTCGHSA enrichment
  18. 2026-06-25 13:49 UTCEPSS rescore
  19. 2026-06-25 13:49 UTCEPSS rescore
  20. 2026-06-24 23:10 UTCEG score recompute
  21. 2026-06-24 23:10 UTCVendor advisory
  22. 2026-06-24 23:10 UTCGHSA enrichment
  23. 2026-06-24 14:05 UTCEPSS rescore
  24. 2026-06-23 21:33 UTCEPSS rescore
  25. 2026-06-22 14:25 UTCEPSS rescore
  26. 2026-06-22 14:25 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 14:56 UTCEPSS rescore
  29. 2026-06-21 01:59 UTCEPSS rescore
  30. 2026-06-19 19:25 UTCEPSS rescore
  31. 2026-06-18 17:52 UTCEPSS rescore
  32. 2026-06-18 17:52 UTCEPSS rescore
  33. 2026-06-17 17:53 UTCEPSS rescore
  34. 2026-06-17 10:49 UTCEG score recompute
  35. 2026-06-17 10:49 UTCVendor advisory
  36. 2026-06-17 10:49 UTCGHSA enrichment
  37. 2026-06-16 17:52 UTCEPSS rescore
  38. 2026-06-16 12:03 UTCEG score recompute
  39. 2026-06-16 12:03 UTCGHSA enrichment
  40. 2026-06-15 17:49 UTCEPSS rescore
  41. 2026-06-15 13:15 UTCEG score recompute
  42. 2026-06-15 13:15 UTCGHSA enrichment
  43. 2026-06-14 11:17 UTCEG score recompute
  44. 2026-06-14 11:17 UTCGHSA enrichment
  45. 2026-06-13 23:00 UTCEPSS rescore
  46. 2026-06-13 12:32 UTCEG score recompute
  47. 2026-06-13 12:32 UTCGHSA enrichment
  48. 2026-06-12 23:12 UTCEPSS rescore
  49. 2026-06-12 23:12 UTCEPSS rescore
  50. 2026-06-12 13:46 UTCEG score recompute
  51. 2026-06-12 13:46 UTCGHSA enrichment
  52. 2026-06-11 15:01 UTCEG score recompute
  53. 2026-06-11 15:01 UTCGHSA enrichment
  54. 2026-06-11 14:00 UTCEPSS rescore
  55. 2026-06-10 22:18 UTCEPSS rescore
  56. 2026-06-10 16:15 UTCEG score recompute
  57. 2026-06-10 16:15 UTCGHSA enrichment
  58. 2026-06-10 13:22 UTCEPSS rescore
  59. 2026-06-10 13:22 UTCEPSS rescore
  60. 2026-06-09 17:30 UTCEG score recompute
  61. 2026-06-09 17:30 UTCGHSA enrichment
  62. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 8.1 · severity → HIGH
  63. 2026-06-08 18:45 UTCEG score recompute
  64. 2026-06-08 18:45 UTCGHSA enrichment
  65. 2026-06-08 14:17 UTCEPSS rescore
  66. 2026-06-08 14:17 UTCEPSS rescore
  67. 2026-06-07 16:34 UTCEG score recompute
  68. 2026-06-07 16:34 UTCGHSA enrichment
  69. 2026-06-07 15:25 UTCEPSS rescore
  70. 2026-06-07 15:25 UTCEPSS rescore
  71. 2026-06-06 17:49 UTCEG score recompute
  72. 2026-06-06 17:49 UTCGHSA enrichment
  73. 2026-06-06 13:47 UTCEPSS rescore
  74. 2026-06-06 13:47 UTCEPSS rescore
  75. 2026-06-05 22:47 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-44394?
CVE-2026-44394 is a high vulnerability published on May 28, 2026. An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone federated token rescoping mechanism does not propagate the original token's expiry to the newly issued token. When a federated user rescopes a token via POST /v3/auth/tokens, the handlescopedtoken() function in the mapped…
When was CVE-2026-44394 disclosed?
CVE-2026-44394 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on June 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44394 actively exploited?
CVE-2026-44394 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44394?
CVE-2026-44394 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.0.
How do I remediate CVE-2026-44394?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44394, 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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