Vulnerability · Published Oct 22, 2026 · Assigned by drupal
CVE-2026-87940Key auth - Moderately critical - Access bypass - SA-CONTRIB-2026-138
Medium 5.4
In plain English
A medium-severity security flaw in Key auth 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 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.2%top 85.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal Key auth allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Key auth versions: from 0.0.0 to 2.2.4.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/key_auth | 2.2.4 | DRUPAL-CONTRIB-2026-138 |
Affected products (as reported)
Weakness: CWE-525 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N