ImageAPI Optimize WebP security updates, in plain English

ImageAPI Optimize WebP

5,417 sites report using it · on drupal.org · 1 security update explained here

This module enables you to generate and serve WebP versions of images.

Below is every security update for ImageAPI Optimize WebP 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.

ImageAPI Optimize WebP

Moderately critical · 5,417 sites report using it · SA-CONTRIB-2026-247 · on drupal.org · Week of 21 October 2026

The module serves image responses with a public cache header for all file schemes other than the private file system. Anyone with no login could view cached versions of files with information they should not be able to access. They could not alter any files.

Who could do thisAnyone visiting the site. No login needed.
Does it apply to youThe site must serve image derivatives from a custom or temporary file scheme with access control behind a shared cache that honours the cache control header, and an attacker must know the path of a previously requested file still in cache.
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 ImageAPI Optimize WebP to 2.1.2.

For developers: what the fix changed

The fix updates the ImageStyleDownloadController to only mark responses as publicly cacheable if the file scheme is public or explicitly configured as an additional public scheme in settings.

2.1.1 to 2.1.2 1 commit, 1 file.

src/Controller/ImageStyleDownloadController.php +14 −1 fix

Full diff, 2.1.1 to 2.1.2

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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ImageAPI Optimize WebP

ImageAPI Optimize WebP

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