CVE-2026-15917: Drupal core - Moderately critical - Cross-site scripting - SA-CORE-2026-011

Q: Does an attacker need an authenticated Drupal account to exploit this issue?

No privileges are required according to the CVSS vector. Exploitation is network-reachable but requires user interaction and has high attack complexity.

Q: What is the expected security impact if exploitation succeeds?

The CVSS vector indicates low-impact confidentiality and integrity effects, with no availability impact. The scope is marked changed.

Published Aug 25, 2026

Updated

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 versions: from 11.3.0 to 11.3.14, from 11.4.0 to 11.4.4, from 0.0.0 to 11.2..

Affected Software

1 affected component

Drupal Drupal Core>=11.3.0<=11.3.14, >=11.4.0<=11.4.4, >=0.0.0<11.2.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade drupal core to a version that resolves this vulnerability.
Patch SA-CORE-2026-011

Event History

Aug 25, 2026

CVE Published

via MITRE·10:22 PM

Data Sourced

via MITRE·10:22 PM

DescriptionWeakness

Data Sourced

via NVD·11:16 PM

DescriptionSeverityWeakness

Frequently Asked Questions

Does an attacker need an authenticated Drupal account to exploit this issue?

No privileges are required according to the CVSS vector. Exploitation is network-reachable but requires user interaction and has high attack complexity.

What is the expected security impact if exploitation succeeds?