CVE-2026-33551

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 87% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

A fix is available — apply it.

An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

April 10, 2026

Last Modified

June 5, 2026

Advisory Details (3)

Auto-updated Aug 2, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

Bug #2142138 “[OSSA-2026-005] Restricted application credentials...” : Bugs : OpenStack Identity (keystone)

https://bugs.launchpad.net/keystone/+bug/2142138
generic

oss-security - [OSSA-2026-005] Keystone: Restricted application credentials can create EC2 credentials (CVE-2026-33551)

http://www.openwall.com/lists/oss-security/2026/04/07/12
generic

OSSA-2026-005: Restricted application credentials can create EC2 credentials — OpenStack Security Advisories 0.0.1.dev359 documentation

https://security.openstack.org/ossa/OSSA-2026-005.html

Vendor Advisories for CVE-2026-33551(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenstack-keystone-1:16.0.3-2.20260616134936.9d699a7.el8ost2026-08-13redhat
redhatopenstack-keystone-1:23.0.3-18.0.20260610133808.9e3dfb4.el9ost2026-07-15redhat
redhatopenstack-keystone-1:19.0.2-17.1.20260529190847.54dd95d.el9ost2026-06-22redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
keystone2:18.0.0-3, 2:18.0.0-3+deb11u1, 2:18.1.0-1+deb11u22:18.1.0-1+deb11u3—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
keystone2:22.0.0-2, 2:22.0.2-0+deb12u12:22.0.2-0+deb12u2—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
keystone2:27.0.0-3, 2:27.0.0-3+deb13u12:27.0.0-3+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
keystone2:27.0.0-3 ... 2:29.0.0~rc1-2 (13 versions)2:29.0.0-2—
PyPI(1)
PackageVulnerable rangeFixed inDependents
keystone14.0.0 ... 26.1.0 (46 versions)26.1.1—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 7× in last 7d / 48× 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 155 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33551?
CVE-2026-33551 is a medium vulnerability published on April 10, 2026. An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role…
When was CVE-2026-33551 disclosed?
CVE-2026-33551 was first published in the National Vulnerability Database on April 10, 2026, with the most recent update on June 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33551 actively exploited?
CVE-2026-33551 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 87.8% of all scored CVEs.
What is the CVSS score of CVE-2026-33551?
CVE-2026-33551 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-33551?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33551, 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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