CVE-2026-9098

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
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.

In Casdoor versions 2.362.0 and earlier, the SAML callback handler in controllers/auth.go accepts any well-formed SAMLResponse sent to /api/acs without verifying that it corresponds to an AuthnRequest previously issued by Casdoor. Additionally, if an administrator disables or deletes an IdP (Identity Provider) after a SAML flow has started, the handler still processes the response using the provider snapshot loaded at the start of the request. As a result, an attacker controlling a registered upstream IdP can send unsolicited SAML responses, or replay a legitimately captured response in a different session or after the original flow has ended. In both cases, Casdoor accepts the response and issues a session, enabling persistent unauthorized access.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
—
EPSS
14.0%
KEV
Not listed

Published

May 28, 2026

Last Modified

June 2, 2026

Advisory Details (1)

Auto-updated Jun 2, 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-2026-9098(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 10× in last 7d / 73× 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 192 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9098?
CVE-2026-9098 is a critical vulnerability published on May 28, 2026. In Casdoor versions 2.362.0 and earlier, the SAML callback handler in controllers/auth.go accepts any well-formed SAMLResponse sent to /api/acs without verifying that it corresponds to an AuthnRequest previously issued by Casdoor. Additionally, if an administrator disables or deletes an IdP…
When was CVE-2026-9098 disclosed?
CVE-2026-9098 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-2026-9098 actively exploited?
CVE-2026-9098 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-9098?
CVE-2026-9098 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-9098?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9098, 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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