Casdoor up to 2.362.0 SAML Call controllers/auth.go origin validation

Summaryinfo

A vulnerability identified as critical has been detected in Casdoor up to 2.362.0. The affected element is an unknown function of the file controllers/auth.go of the component SAML Call Handler. This manipulation causes origin validation. This vulnerability appears as CVE-2026-9098. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Casdoor up to 2.362.0. Affected by this vulnerability is some unknown functionality of the file controllers/auth.go of the component SAML Call Handler. The manipulation with an unknown input leads to a origin validation vulnerability. The CWE definition for the vulnerability is CWE-346. The product does not properly verify that the source of data or communication is valid. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In Casdoor versions 2.362.0 and earlier, the SAML callback handler in controllers/auth.go accepts any well-formed SAMLResponse sent to /api/acs without verifying that it corresponds to an AuthnRequest previously issued by Casdoor. Additionally, if an administrator disables or deletes an IdP (Identity Provider) after a SAML flow has started, the handler still processes the response using the provider snapshot loaded at the start of the request. As a result, an attacker controlling a registered upstream IdP can send unsolicited SAML responses, or replay a legitimately captured response in a different session or after the original flow has ended. In both cases, Casdoor accepts the response and issues a session, enabling persistent unauthorized access.

It is possible to read the advisory at kb.cert.org. This vulnerability is known as CVE-2026-9098 since 05/20/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/28/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Casdoor

Version

• 2.362

CPE 2.3info

• 🔒

CPE 2.2info

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