Vulnerability · Published Mar 25, 2026 · Assigned by drupal
CVE-2026-3211Theme Negotiation by Rules - Moderately critical - Cross-site request forgery - SA-CONTRIB-2026-012
Medium 4.3
In plain English
A medium-severity cross-site request forgery in Theme Negotiation by Rules from Drupal. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.1%top 99.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist:https://packages.drupal.org/8 | drupal/theme_rule | 1.2.1 | DRUPAL-CONTRIB-2026-012 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Drupal | Theme Negotiation by Rules | 0.0.0 – before 1.2.1 |
Weakness: CWE-352 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N