Component blocks security updates, in plain English

Component blocks

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

This module allows a website to use user interface patterns with blocks in the layout builder.

Below is every security update for Component blocks 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.

Component blocks

Moderately critical · 179 sites report using it · SA-CONTRIB-2026-123 · on drupal.org · Week of 2 September 2026

The module does not properly check user input before replacing text placeholders. A user with an ordinary account could read hidden data or change data.

Who could do thisOnly someone with a login on your site.
Does it apply to youAny site using this module where an attacker has an access right to edit layouts.
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 Component blocks to 1.2.7.

For developers: what the fix changed

The fix applies Xss::filterAdmin to the value before token replacement in the ComponentBlock class.

1.2.6 to 1.2.7 1 commit, 2 files including 1 test.

src/Plugin/Block/ComponentBlock.php +2 −1 fix

Full diff, 1.2.6 to 1.2.7

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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Component blocks

Component blocks

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