Drupal SAML SSO Auth Bypass (capturereplay) v03.2.0
CVE-2026-87952 Published on October 22, 2026
SAML SSO - Service Provider - Moderately critical - Insufficient replay protection - SA-CONTRIB-2026-150
Authentication Bypass by Capture-replay vulnerability in Drupal SAML SSO - Service Provider allows Remote Services with Stolen Credentials. This issue affects SAML SSO - Service Provider versions: from 0.0.0 to 3.2.0.
Vulnerability Analysis
CVE-2026-87952 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
Authentication Bypass by Capture-replay
A capture-replay flaw exists when the design of the software makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). Capture-replay attacks are common and can be difficult to defeat without cryptography. They are a subset of network injection attacks that rely on observing previously-sent valid commands, then changing them slightly if necessary and resending the same commands to the server.
Affected Versions
Drupal SAML SSO - Service Provider:- Version 0.0.0 and below 3.2.0 is affected.