Vulnerability · Published Mar 26, 2026 · Assigned by drupal
CVE-2026-3531OpenID Connect / OAuth client - Moderately critical - Access bypass - SA-CONTRIB-2026-026
Medium 6.5
In plain English
A medium-severity authentication bypass in OpenID Connect / OAuth client from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 82.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client allows Authentication Bypass.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/openid_connect | 1.5.0 | DRUPAL-CONTRIB-2026-026 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | OpenID Connect / OAuth client | 0.0.0 – before 1.5.0 |
Weakness: CWE-288 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N