PT-2026-55389 · Go · Github.Com/Casdoor/Casdoor

Published 2026-05-28 · Updated 2026-05-28

OSV

CVSS v3.1

9.1

Critical

Base vector

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

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.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

GHSA-FWGQ-J9R9-QJGR

Affected Products

Github.Com/Casdoor/Casdoor

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-9090 · Security Note
• https://osv.dev/vulnerability/GHSA-fwgq-j9r9-qjgr · Vendor Advisory
• https://github.com/casdoor/casdoor · Note
• https://kb.cert.org/vuls/id/780781 · Note