CVE-2026-9090: Casdoor has an authentication bypass

May 28, 2026 (updated July 2, 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 pre-configured Identity Provider certificate, allowing an attacker to forge assertions signed with an attacker-controlled key.

References

github.com/advisories/GHSA-fwgq-j9r9-qjgr
kb.cert.org/vuls/id/780781
nvd.nist.gov/vuln/detail/CVE-2026-9090

Code Behaviors & Features

Detect and mitigate CVE-2026-9090 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →