Drupal SAML SSO - Service Provider SSRF (v <=3.2.0)
CVE-2026-87953 Published on October 22, 2026
SAML SSO - Service Provider - Moderately critical - Server Side Request Forgery - SA-CONTRIB-2026-151
Server-Side Request Forgery (SSRF) vulnerability in Drupal SAML SSO - Service Provider allows Server Side Request Forgery. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
Weakness Type
What is a SSRF Vulnerability?
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. By providing URLs to unexpected hosts or ports, attackers can make it appear that the server is sending the request, possibly bypassing access controls such as firewalls that prevent the attackers from accessing the URLs directly. The server can be used as a proxy to conduct port scanning of hosts in internal networks, use other URLs such as that can access documents on the system (using file://), or use other protocols such as gopher:// or tftp://, which may provide greater control over the contents of requests.
CVE-2026-87953 has been classified to as a SSRF vulnerability or weakness.
Affected Versions
Drupal SAML SSO - Service Provider:- Version 0.0.0 and below 3.2.0 is affected.