Vulnerability · Published Oct 30, 2026 · Assigned by drupal
CVE-2026-118554OpenID Connect Client - Moderately critical - Improper authentication - SA-CONTRIB-2026-287
Unrated
In plain English
A authentication bypass in OpenID Connect 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 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 91.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect Client allows Authentication Bypass. This issue affects OpenID Connect Client versions: from 0.0.0 to 2.3.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/oidc | 2.3.1 | DRUPAL-CONTRIB-2026-287 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | OpenID Connect Client | 0.0.0 – before 2.3.1 |
Weakness: CWE-288