CVE-2026-9090

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-28. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Casdoor versions 2.362.0 and earlier contain a vulnerability that allows an attacker to bypass authentication by supplying an arbitrary signing certificate. The buildSpCertificateStore function extracts the X.509 certificate directly from the incoming SAMLResponse instead of using the trusted pre-configured Identity Provider certificate, allowing an attacker to forge assertions signed with an attacker-controlled key.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
10.1%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated May 31, 2026
No patch confirmed yet. Sources: cert.
cert

VU#780781 - Casdoor contains multiple authentication bypass and access management vulnerabilities

https://kb.cert.org/vuls/id/780781

Vendor Advisories for CVE-2026-9090(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
gogithub.com/casdoor/casdoor—ghsa

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.

Data Freshness Timeline

(refreshed 13× in last 7d / 121× 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 323 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-9090?
CVE-2026-9090 is a critical vulnerability published on May 28, 2026. Casdoor versions 2.362.0 and earlier contain a vulnerability that allows an attacker to bypass authentication by supplying an arbitrary signing certificate. The buildSpCertificateStore function extracts the X.509 certificate directly from the incoming SAMLResponse instead of using the trusted…
When was CVE-2026-9090 disclosed?
CVE-2026-9090 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9090 actively exploited?
CVE-2026-9090 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9090?
CVE-2026-9090 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-9090?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9090, 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.

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