CVE-2026-9090

critical · 9.1

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.

9.1

CVSS

0.2%

EPSS (exploit prob.)

12th

EPSS percentile

2026-05-28

Published

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

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-9090