CVE-2026-3211: Theme Negotiation by Rules - Moderately critical - Cross-site request forgery - SA-CONTRIB-2026-012

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-25 · updated 2026-06-17
Weakness: CWE-352

Description

Cross-Site Request Forgery (CSRF) vulnerability in Drupal Theme Negotiation by Rules allows Cross Site Request Forgery.This issue affects Theme Negotiation by Rules: from 0.0.0 before 1.2.1.

Affected products

Drupal Theme Negotiation by Rules: before 1.2.1 — fixed in 1.2.1

How to fix

Upgrade to a fixed version: Drupal Theme Negotiation by Rules 1.2.1. Check the vendor advisory for mitigations.

References

https://www.drupal.org/sa-contrib-2026-012

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