SB2026101478 - Cross-site scripting in Drupal

Description

This security bulletin contains information about 1 vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2026-108514)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

The vulnerability allows a remote user to execute arbitrary script in the context of the affected website.

The vulnerability exists due to insufficient sanitization of attributes in the Navigation module when processing user-supplied attribute values. A remote user can supply specially crafted attribute values to execute arbitrary script in the context of the affected website.

Exploitation requires a role with permission to enter HTML tags containing specific data attributes, or the administer menu permission.

Remediation

Install update from vendor's website.

References

• https://www.drupal.org/sa-core-2026-016
• https://www.drupal.org/node/3610746