CVE-2026-4093: In the Drupal 7 Term Reference Tree module, two stored XSS vectors exist in the widget/formatter rendering pip

Routine

MEDIUM 5.4UPGRADE

CVE-2026-4093 is a medium-severity flaw (CVSS 5.4) affecting taxonomy term reference tree widget. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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-controlled token output (e.g., term description) is rendered without proper sanitization. Any user who can edit the referenced taxonomy terms can inject HTML/JS that executes when the field is rendered. Vector

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-05-21
Last modified	2026-07-23

Publisher (CNA): Drupal.org · Vendor: taxonomy term reference tree widget project

Last updated 2026-07-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-21 22:16 UTCPublished CVE record published
2026-07-23 16:10 UTCUpdated Record last modified

taxonomy term reference tree widget project taxonomy term reference tree widget UPGRADE

Affected: >= 7.x-1.0 and < 7.x-1.12

Fixed in: 7.x-1.12

Safe to downgrade to: a release before 7.x-1.0

1. Check installed version

apt-cache policy taxonomy-term-reference-tree-widget || rpm -q taxonomy-term-reference-tree-widget || taxonomy-term-reference-tree-widget --version

2. UPGRADE to 7.x-1.12 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade taxonomy-term-reference-tree-widget

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade taxonomy-term-reference-tree-widget

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.x-1.0 (Debian / Ubuntu)

apt-cache madison taxonomy-term-reference-tree-widget sudo apt install taxonomy-term-reference-tree-widget=<VERSION_BEFORE_7.x-1.0> sudo apt-mark hold taxonomy-term-reference-tree-widget

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list taxonomy-term-reference-tree-widget sudo dnf downgrade taxonomy-term-reference-tree-widget-<VERSION_BEFORE_7.x-1.0> sudo dnf versionlock add taxonomy-term-reference-tree-widget

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-4093?

taxonomy term reference tree widget: upgrade to 7.x-1.12. Exact commands for each OS are on this page.

Is CVE-2026-4093 being exploited?

CVE-2026-4093 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-4093 affect?

CVE-2026-4093 affects taxonomy term reference tree widget. Severity is medium (CVSS 5.4). 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-

How urgent is CVE-2026-4093?

Priority 26/100. Public exploit reference

Software pages

Drupal vulnerabilities

References

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