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VulnerabilityPublished

CVE-2026-126744: Layout builder iframe modal · This module renders Layout Builder forms inside an iframe in a modal

Affects drupal/layout_builder_iframe_modalSource GCVE Database

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Not known to be exploited : upgrade to 1.3.9 when convenient.

Data as of 11 Nov 2026, 20:05 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch
Available – fixed in 1.3.9

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 11 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade drupal/layout_builder_iframe_modal to 1.3.9.

Affected software

ProductAffectedFixed in
Packagist https //packages.drupal.org/8drupal/layout_builder_iframe_modalAffected
  • <1.3.9
Fixed in
  • 1.3.9

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade the Layout Builder iframe modal module to version 1.3.9 or later, where the vulnerability is fixed. No other specific mitigations are indicated. Since a patch is available, applying the official fix is the recommended remediation.

Description

The Layout Builder iframe modal module for Drupal renders forms inside an iframe within a modal dialog using the admin theme. It includes a custom Ajax command to open the iframe dialog that does not sanitize dialog options as strictly as Drupal core does, leading to a potential cross-site scripting (XSS) vulnerability. Exploitation requires the attacker to control the Ajax response or inject markup with specific attributes. A fix is available in version 1.3.9.

References

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