CVE-2026-42999

HIGHNVD 8.86.0▼
EchelonGraph scoreMEDIUM confidence

Score 6.0 from GitHub Security Advisory published 2026-05-28. NVD baseline CVSS 8.8; sources differ by 2.8.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this week
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

A fix is available — apply it.

An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).

CVSS v3
8.8
EG Score
6.0(medium)
EPSS
25.0%
KEV
Not listed

Published

May 28, 2026

Last Modified

July 15, 2026

Advisory Details (2)

Auto-updated Jun 9, 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 #2148398 “[OSSA-2026-015] RBAC Policy Target Injection via J...” : Bugs : OpenStack Identity (keystone)

https://bugs.launchpad.net/keystone/+bug/2148398

Vendor Advisories for CVE-2026-42999(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(2)

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 11× in last 7d / 66× 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 130 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:26 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  3. 2026-07-15 02:00 UTCEPSS rescore
  4. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 6 · severity → MEDIUM
  5. 2026-07-13 22:30 UTCEPSS rescore
  6. 2026-07-13 06:13 UTCEPSS rescore
  7. 2026-07-12 05:46 UTCEPSS rescore
  8. 2026-07-11 22:35 UTCEG score recompute
  9. 2026-07-11 22:35 UTCVendor advisory
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-08 22:50 UTCEG score recompute
  13. 2026-07-08 22:50 UTCVendor advisory
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-07 13:46 UTCEPSS rescore
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 02:23 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-05 02:30 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-02 23:31 UTCEG score recompute
  22. 2026-07-02 23:31 UTCVendor advisory
  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-07-01 03:47 UTCEG score recompute
  25. 2026-07-01 03:47 UTCVendor advisory
Show 75 more
  1. 2026-07-01 03:47 UTCGHSA enrichment
  2. 2026-06-30 23:22 UTCEPSS rescore
  3. 2026-06-29 19:46 UTCEG score recompute
  4. 2026-06-29 19:46 UTCVendor advisory
  5. 2026-06-29 19:46 UTCGHSA enrichment
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-28 19:56 UTCEG score recompute
  8. 2026-06-28 19:56 UTCVendor advisory
  9. 2026-06-28 19:56 UTCGHSA enrichment
  10. 2026-06-28 14:07 UTCEPSS rescore
  11. 2026-06-28 04:56 UTCEPSS rescore
  12. 2026-06-27 20:47 UTCEG score recompute
  13. 2026-06-27 20:47 UTCVendor advisory
  14. 2026-06-27 20:47 UTCGHSA enrichment
  15. 2026-06-27 03:08 UTCEPSS rescore
  16. 2026-06-26 21:49 UTCEG score recompute
  17. 2026-06-26 21:49 UTCVendor advisory
  18. 2026-06-26 21:49 UTCGHSA enrichment
  19. 2026-06-25 22:52 UTCEG score recompute
  20. 2026-06-25 22:52 UTCVendor advisory
  21. 2026-06-25 22:52 UTCGHSA enrichment
  22. 2026-06-25 13:49 UTCEPSS rescore
  23. 2026-06-25 13:49 UTCEPSS rescore
  24. 2026-06-24 23:10 UTCEG score recompute
  25. 2026-06-24 23:10 UTCVendor advisory
  26. 2026-06-24 23:10 UTCGHSA enrichment
  27. 2026-06-24 14:05 UTCEPSS rescore
  28. 2026-06-23 21:33 UTCEPSS rescore
  29. 2026-06-22 14:25 UTCEPSS rescore
  30. 2026-06-22 14:25 UTCEPSS rescore
  31. 2026-06-21 14:56 UTCEPSS rescore
  32. 2026-06-21 14:56 UTCEPSS rescore
  33. 2026-06-21 01:59 UTCEPSS rescore
  34. 2026-06-19 19:25 UTCEPSS rescore
  35. 2026-06-18 17:52 UTCEPSS rescore
  36. 2026-06-18 17:52 UTCEPSS rescore
  37. 2026-06-17 17:53 UTCEPSS rescore
  38. 2026-06-17 14:48 UTCEG score recompute
  39. 2026-06-17 14:48 UTCVendor advisory
  40. 2026-06-17 14:48 UTCGHSA enrichment
  41. 2026-06-16 17:52 UTCEPSS rescore
  42. 2026-06-16 15:50 UTCEG score recompute
  43. 2026-06-16 15:50 UTCGHSA enrichment
  44. 2026-06-15 17:49 UTCEPSS rescore
  45. 2026-06-15 13:15 UTCEG score recompute
  46. 2026-06-15 13:15 UTCGHSA enrichment
  47. 2026-06-14 13:26 UTCEG score recompute
  48. 2026-06-14 13:26 UTCGHSA enrichment
  49. 2026-06-13 23:00 UTCEPSS rescore
  50. 2026-06-13 14:28 UTCEG score recompute
  51. 2026-06-13 14:28 UTCGHSA enrichment
  52. 2026-06-12 23:12 UTCEPSS rescore
  53. 2026-06-12 23:12 UTCEPSS rescore
  54. 2026-06-12 15:30 UTCEG score recompute
  55. 2026-06-12 15:30 UTCGHSA enrichment
  56. 2026-06-11 16:30 UTCEG score recompute
  57. 2026-06-11 16:30 UTCGHSA enrichment
  58. 2026-06-11 14:00 UTCEPSS rescore
  59. 2026-06-10 22:18 UTCEPSS rescore
  60. 2026-06-10 16:40 UTCEG score recompute
  61. 2026-06-10 16:40 UTCGHSA enrichment
  62. 2026-06-10 13:22 UTCEPSS rescore
  63. 2026-06-10 13:22 UTCEPSS rescore
  64. 2026-06-09 17:43 UTCEG score recompute
  65. 2026-06-09 17:43 UTCGHSA enrichment
  66. 2026-06-08 23:31 UTCNVD updateCVSS v3 → 8.8 · severity → HIGH
  67. 2026-06-08 18:45 UTCEG score recompute
  68. 2026-06-08 18:45 UTCGHSA enrichment
  69. 2026-06-08 14:17 UTCEPSS rescore
  70. 2026-06-08 14:17 UTCEPSS rescore
  71. 2026-06-07 18:07 UTCEG score recompute
  72. 2026-06-07 18:07 UTCGHSA enrichment
  73. 2026-06-07 15:25 UTCEPSS rescore
  74. 2026-06-07 15:25 UTCEPSS rescore
  75. 2026-06-06 19:08 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-42999?
CVE-2026-42999 is a high vulnerability published on May 28, 2026. An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforcecall unconditionally merges the raw JSON request body into the policy enforcement dictionary via policydict.update(jsoninput.copy()), overwriting trusted target data that was previously set from…
When was CVE-2026-42999 disclosed?
CVE-2026-42999 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42999 actively exploited?
CVE-2026-42999 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42999?
CVE-2026-42999 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.0.
How do I remediate CVE-2026-42999?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42999, 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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