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CVE-2026-9093 — Vulnerability in github.com/casdoor/casdoor — CVE...

CRITICAL

Casdoor does not validate the AudienceRestriction element in SAML assertions

Published May 28, 2026Updated July 7, 2026Source: osv

Summary

In Casdoor versions 2.362.0 and earlier, the SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. The buildSp function in object/saml_sp.go never sets AudienceURI on the gosaml2 SAMLServiceProvider struct and never inspects WarningInfo.NotInAudience. This allows assertions issued for other service providers to be accepted by Casdoor.

Advisory Timeline

  • First published May 28, 2026 (137 days ago).
  • Last revised July 7, 2026 — 40 days after initial publication.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/casdoor/casdoor
go
All versionsRange-based data available

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-9093?
Casdoor does not validate the AudienceRestriction element in SAML assertions This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-9093?
CVE-2026-9093 affects github.com/casdoor/casdoor. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-9093 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-3w4h-g9f5-j84p
GO-2026-5894

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