CVE-2026-9090

CRITICAL

Casdoor < 2.362.0 - Authentication Bypass via Arbitrary SAML Certificate

Title source: llm

Description

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 (1)

Core 1

Core References

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

Scores

CVSS v3 9.1

EPSS 0.0016

EPSS Percentile 5.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

Status published

Products (1)

Casdoor/Casdoor < 2.362.0

Published May 28, 2026

Tracked Since May 28, 2026