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PatchSiren cyber security CVE debrief

CVE-2026-87940 Drupal CVE debrief

The Key auth module for Drupal is vulnerable to an access bypass issue due to the use of web browser cache containing sensitive information. Affected versions range from 0.0.0 to 2.2.4. This moderately critical vulnerability can lead to potential unauthorized access to sensitive information and impact data confidentiality and integrity. Drupal users who have installed the Key auth module should assess their exposure and take necessary actions to mitigate the vulnerability. The issue requires attention to prevent potential access bypass and unauthorized information disclosure.

Vendor
Drupal
Product
Key auth
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-22
Original CVE updated
2026-10-22
Advisory published
2026-10-22
Advisory updated
2026-10-22

Who should care

Drupal users who have installed the Key auth module, specifically those with versions ranging from 0.0.0 to 2.2.4, should assess their exposure and take necessary actions to mitigate the vulnerability.

Why it matters

The CVE-2026-87940 vulnerability in Drupal's Key auth module requires attention from Drupal users to prevent potential access bypass and unauthorized information disclosure.

  • Potential unauthorized access to sensitive information due to cache exploitation
  • Need for verification of Key auth version and access control configurations
  • Possible impact on data confidentiality and integrity

Technical summary

The Key auth module for Drupal is vulnerable to an access bypass issue due to the use of web browser cache containing sensitive information. This issue affects Key auth versions from 0.0.0 to 2.2.4. The vulnerability can lead to potential unauthorized access to sensitive information and impact data confidentiality and integrity. Defenders should prioritize verifying and updating Key auth versions to 2.2.4 or later, reviewing access control configurations, and ensuring proper cache handling.

Defensive priority

Defenders should prioritize verifying and updating Key auth versions to 2.2.4 or later, reviewing access control configurations, and ensuring proper cache handling.

Recommended defensive actions

  • Verify and update Key auth to version 2.2.4 or later
  • Review access control configurations for Key auth
  • Ensure proper cache handling for sensitive information

Evidence notes

The vulnerability, CVE-2026-87940, in Drupal's Key auth module is described as moderately critical with an access bypass issue. The affected product is Key auth, a Drupal module. Evidence is based on official CVE Program records and NIST NVD detail pages. Defenders should verify and update Key auth versions to 2.2.4 or later, review access control configurations, and ensure proper cache handling for sensitive information. The vulnerability affects Key auth versions from 0.0.0 to 2.2.4.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-87940 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-87940

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-87940 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-87940

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.