Combined image style security updates, in plain English

Combined image style

50 sites report using it · on drupal.org · 1 security update explained here

This module lets you combine multiple image designs into a single image.

Below is every security update for Combined image style 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.

Combined image style

Moderately critical · 50 sites report using it · SA-CONTRIB-2026-188 · on drupal.org · Week of 23 September 2026

Anyone without logging in could force the server to generate many new images without the right security token. They could not view any hidden files and they could not alter any existing images.

Who could do thisAnyone visiting the site. No login needed.
Does it apply to youAny site using this module.
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 Combined image style to 1.0.7.

For developers: what the fix changed

The fix adds validation in `ImageStyleDownloadController::deliverCombined()` to throw a `NotFoundHttpException` if the requested image style names do not fully resolve. It also updates `CombinedImageStyle::getPathToken()` to return a random string instead of an empty string when there are no image styles, preventing empty tokens from bypassing validation.

Also in this release Added functional tests for combined image style delivery.

1.0.6 to 1.0.7 1 commit, 3 files including 1 test.

src/Controller/ImageStyleDownloadController.php +23 −1 fix
src/Entity/CombinedImageStyle.php +9 −0 fix

Full diff, 1.0.6 to 1.0.7

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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Combined image style

Combined image style

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