Gutenberg security updates, in plain English

Gutenberg

5,103 sites report using it · on drupal.org · 1 security release explained here

It provides a new interface for editing pieces of content using a block editor.

Below is every security release for Gutenberg 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.

Gutenberg

Moderately critical · 5,103 sites report using it · SA-CONTRIB-2026-202 · on drupal.org · Week of 7 October 2026

It provides a new interface for editing pieces of content using a block editor.

A writer using the visual editor could access restricted parts of the system. They could read hidden information through the editor tools. They could also alter some restricted content.

Who could do thisOnly someone with a login on your site.
Does it apply to youA site is affected if an attacker has a role with the use gutenberg access right.
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 Gutenberg to 8.x-2.15 or 3.0.7, whichever branch you are on.

For developers: what the fix changed

Adds missing entity access checks by adding _entity_access requirements to several routes in gutenberg.routing.yml and explicitly verifying view access in src/Controller/MediaController.php and src/Service/MediaService.php.

Also in this release Normalised configuration schemas, added the missing core block, and improved UI logic for moving fields and selecting blocks.

8.x-2.14 to 8.x-2.15 6 commits, 19 files.

config/install/gutenberg.mediaedit.yml +0 −1
config/schema/gutenberg.schema.yml +3 −1
gutenberg.api.php +28 −0
gutenberg.blocks.yml +3 −2
gutenberg.install +5 −2
gutenberg.module +212 −94
gutenberg.post_update.php +61 −0
gutenberg.routing.yml +11 −1 fix
js/admin.es6.js +15 −3
js/admin.js +10 −3
js/drupal-blocks.js +1 −1
js/drupal-media.es6.js +1 −1

Full diff, 8.x-2.14 to 8.x-2.15 · Full diff, 3.0.6 to 3.0.7

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

Get in touch

Tell me who you are, what your organisation does, and what you need. That might be a Drupal site that needs looking after, an upgrade to get done before December, or an agency that needs Drupal cover.

If I can help, I'll say so and suggest a call. If I can't, I'll tell you straight away rather than waste your time.

For context: I work mainly with UK charities, membership bodies and research organisations, and with the agencies that look after their websites. Not recruiters.

Or start smaller and connect with me on LinkedIn. That's where I post what I find digging around in charity and grants data, and where the free tools turn up first.

Gutenberg

Gutenberg

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