What is CVE-2026-4093?

CVE-2026-4093 is a medium-severity vulnerability in Drupal Term Reference Tree, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-21.

How severe is CVE-2026-4093?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Drupal Term Reference Tree

CVE-2026-4093

In the Drupal 7 Term Reference Tree module, two stored XSS vectors exist in the widget/formatter rendering pipeline. Vector A (token display templates): When the Token module is enabled and token display templates are configured, attacker…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (8.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Drupal Term Reference Tree — versions 7.x-1.x
Taxonomy_term_reference_tree_widget_project Taxonomy_term_reference_tree_widget

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

mlhess@drupal.org (Third Party Advisory, third-party-advisory)
mlhess@drupal.org (Exploit, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-4093?: CVE-2026-4093 is a medium-severity vulnerability in Drupal Term Reference Tree, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-21.
How severe is CVE-2026-4093?: Medium severity. CVSS v3 base score is 5.4 out of 10.