CVE-2026-3532 OpenID Connect / OAuth client - Less critical - Access bypass - SA-CONTRIB-2026-027

Medium 4.2 Published 26 Mar 2026 Updated 27 Mar 2026

Attackers can bypass authentication via case sensitivity flaws in the Drupal OpenID Connect plugin, leading to privilege escalation.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-3532?

CVE-2026-3532 is a medium-severity authentication bypass vulnerability in Drupal OpenID Connect / OAuth client, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Improper Handling of Case Sensitivity vulnerability in Drupal OpenID Connect / OAuth client allows Privilege Escalation.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0.

Weakness: CWE-178

Which versions are affected by CVE-2026-3532?

It affects 1 product.

Linux distribution packages (1)

drupal/openid_connect Packagist:https://packages.drupal.org/8 All versions 1.5.0

Products include Bojanz Openid Connect \/ Oauth Client.

How do I fix CVE-2026-3532?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-3532 being exploited?

There is no known exploitation of CVE-2026-3532 in the wild and no public exploit code.

Sources

Also known as DRUPAL-CONTRIB-2026-027, GHSA-g8fg-x943-8cvw.