Key auth security updates, in plain English

Key auth

5,630 sites report using it · on drupal.org · 1 security update explained here

This module allows users to log in using a special security key instead of a username and password.

Below is every security update for Key auth that this site has covered, newest first. Each one says who could exploit it, whether it applies to your site, how urgent it is, and what to tell your developer. If your site uses this module and you are not sure which version, that is the first question to ask whoever looks after it.

Key auth

Moderately critical · 5,630 sites report using it · SA-CONTRIB-2026-138 · on drupal.org · Week of 9 September 2026

The module does not store pages separately for each user when caching is turned on. A user with an ordinary account could see the security keys belonging to another user with the same access rights to read private information and change some data.

Who could do thisOnly someone with a login on your site.
Does it apply to youA site is affected if the dynamic page cache module is turned on.
Has it been used in attacksNo sign of it.
How urgentDrupal rates this moderately critical. Include it in your next routine update, within the month.

Tell your developerUpdate Key auth to 2.2.4.

For developers: what the fix changed

The fix updates src/Form/UserKeyAuthForm.php to explicitly add per user caching to the access results in buildForm and checkAccess.

Also in this release Added a test for view only key access.

2.2.3 to 2.2.4 3 commits, 2 files including 1 test.

src/Form/UserKeyAuthForm.php +20 −13 fix

Full diff, 2.2.3 to 2.2.4

The comparison is against the release immediately before the fix. If your site is on an older release, more will have changed.

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Key auth

Key auth

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