---
id: "CVE-2026-108515"
kind: "vulnerability"
aliases: ["CVE-2026-108515"]
title: "Drupal core: cross-site scripting flaw lets attackers run scripts in pages"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["drupal", "php", "runtime", "self-hosted"]
not_affected_if: ["version-outside-listed-ranges"]
published_at: "2026-10-30T04:18:07+00:00"
first_seen_at: "2026-10-30T04:28:36+00:00"
updated_at: "2026-10-30T04:31:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-108515", "first_seen_at": "2026-10-30T04:28:36+00:00"}]
---

# Drupal core: cross-site scripting flaw lets attackers run scripts in pages

Drupal core versions in several ranges fail to neutralize input when generating web pages, allowing Cross-Site Scripting. An attacker can get script to run in a visitor's browser, in the context of the affected site.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Drupal core version with `composer show drupal/core` or the Drupal status report.
- Compare it against the affected ranges: `8.9.0` to `10.6.19`, `11.0.0` to `11.3.19`, `11.4.0` to `11.4.10`, and `12.0.0-alpha1` to `12.0.0-beta2`.

## Timeline

- 2026-10-30T04:28:36+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-108515

## From the sources

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 8.9.0 to 10.6.19, from 11.0.0 to 11.3.19, from 11.4.0 to 11.4.10, from 12.0.0-alpha1 to 12.0.0-beta2.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_