CVE-2026-9090

CVE-2026-9090

Published May 28, 2026 CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-fwgq-j9r9-qjgr Casdoor has an authentication bypass
References
History
Type Values Removed Values Added
Weaknesses CWE-285
Type Values Removed Values Added
Weaknesses CWE-295
CWE-307
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Casdoor
Casdoor casdoor
Weaknesses CWE-295
CWE-307
Vendors & Products Casdoor
Casdoor casdoor
Type Values Removed Values Added
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.
Title CVE-2026-9090
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
certcc
Published
Updated
May 29, 2026, 7:41 PM
Reserved
May 20, 2026, 3:03 PM
Status
Deferred
Published
May 28, 2026, 5:16 PM
Modified
Jun 17, 2026, 11:04 AM