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
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 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)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
12%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (1)

Auto-updated Aug 1, 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.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/casdoor/casdoor———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 129× 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 339 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

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 0% probability of exploitation in the next 30 days, which ranks it in the top 88.1% of all scored CVEs.
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.

Dependency Blast Radius

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