Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-003

published 2026-04-15 6 mo ago modified 2026-09-10 1 mo ago also BIT-drupal-2026-6367 , DRUPAL-CORE-2026-003 , EUVD-2026-31002 , GHSA-pw6f-3999-xp7g

cvss: 6.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits: 0; none known

Improper Neutralization of Input During Web Page Generation ("Cross-site Scripting") vulnerability in Drupal Drupal core allows Cross-Site Scripting (XSS).

This issue affects Drupal core: from 11.3.0 before 11.3.7.

Patch / fix

fixed in 3

packagist drupal/core 11.3.7
bitnami drupal 11.3.7
Drupal Drupal core 11.3.7

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 5 mo ago (2026-05-20)

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CNA	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
OSV	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	drupal/core	>=11.3.0, <11.3.7	11.3.7
bitnami	drupal	>=11.3.0, <11.3.7	11.3.7

Affected products

Drupal Drupal core

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

drupal.org /sa-core-2026-003
web, vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2026-6367
advisory, web
github.com /drupal/core
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary