CVE-2026-87940
Key auth - Moderately critical - Access bypass - SA-CONTRIB-2026-138
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Key auth - Moderately critical - Access bypass - SA-CONTRIB-2026-138
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.
- Record
CVE-2026-87940- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-525
- Updated
- 2026-11-02
EUVDEUVD-2026-107861
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.
- Record
EUVD-2026-107861- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-jxp7-mx43-ch9f
Use of Web Browser Cache Containing Sensitive Information vulnerability in Drupal Key auth allows...
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.
- Record
GHSA-jxp7-mx43-ch9f- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-525
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-87940- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-525
- Updated
- 2026-11-02
OSV
Key auth - Moderately critical - Access bypass - SA-CONTRIB-2026-138
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.
- Record
CVE-2026-87940- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-525
- Updated
- 2026-11-02
OSVDRUPAL-CONTRIB-2026-138 No score
This module enables you to add key-based authentication on a per-user
basis.
The module doesn't cache per user, potentially allowing an attacker to view another user's authentication keys, if the attacker has the same permissions.
This vulnerability is mitigated by the fact that the site must have the dynamic_page_cache module enabled.
- Record
DRUPAL-CONTRIB-2026-138- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
drupal/key_authPackagist:https://packages.drupal.org/8 |
before 2.2.4 | 2.2.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-87940 is a medium vulnerability (CVSS 5.4) in Drupal Key Auth, published September 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.23%, the 14th percentile. Fixed in drupal/key_auth 2.2.4.