CVE-2026-58588 Drupal Canvas - Moderately critical - Improper validation - SA-CONTRIB-2026-066

Medium 6.1 Published 10 Jul 2026 Updated 13 Jul 2026

Attackers can inject malicious scripts via improper input validation in the Drupal Canvas module, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-58588?

CVE-2026-58588 is a medium-severity cross-site scripting vulnerability in Drupal Canvas, published on 10 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal Canvas allows Cross-Site Scripting (XSS). This issue affects Drupal Canvas versions: from 0.0.0 to 1.4.2, from 1.5.0 to 1.5.2, from 1.6.0 to 1.6.1, from 1.7.0 to 1.7.1.

Weakness: CWE-79

Which versions are affected by CVE-2026-58588?

It affects 1 product.

Linux distribution packages (1)

drupal/canvas Packagist:https://packages.drupal.org/8 All versions 1.4.2, 1.5.2, 1.6.1, 1.7.1

Products include Drupal Canvas Project Drupal Canvas.

How do I fix CVE-2026-58588?

Upgrade to a fixed version.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-58588 being exploited?

There is no known exploitation of CVE-2026-58588 in the wild and no public exploit code.

Sources

Also known as DRUPAL-CONTRIB-2026-066, GHSA-4jgx-vqf2-p9g9.