---
id: CVE-2026-109345
title: >-
  DOMPurify before 3.4.16 contains a cross-site scripting vulnerability that
  allows attackers to bypass sanitization because IN_PLACE mode returns a
  force-removed style element whose text content still carries markup
summary: >-
  DOMPurify before 3.4.16 contains a cross-site scripting vulnerability that
  allows attackers to bypass sanitization because IN_PLACE mode returns a
  force-removed style element whose text content still carries markup. Attackers
  can supply …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: cure53
product: DOMPurify
affected:
  - DOMPurify < 3.4.16
published: '2026-10-12'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T17:27:24.847'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109345'
references:
  - url: >-
      https://github.com/cure53/DOMPurify/security/advisories/GHSA-6688-9rhm-gjv2
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/dompurify-before-3.4.16-xss-via-in-place-returned-rawtext-root
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/cure53/DOMPurify/security/advisories/GHSA-6688-9rhm-gjv2
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109345.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-109345'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2549763'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-109345'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109345'
tags:
  - nvd
  - cve.org
  - exploit-available
  - csaf
  - vex
  - red-hat
epss: 0.0025
epssPercentile: 0.16239
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-13T17:39:41.683886Z'
ingestedAt: '2026-10-12T18:00:08.209Z'
---

## Overview

DOMPurify before 3.4.16 contains a cross-site scripting vulnerability that allows attackers to bypass sanitization because IN_PLACE mode returns a force-removed style element whose text content still carries markup. Attackers can supply a style element containing a closing style tag and an img onerror payload, which executes script when the application serializes and re-parses the returned node.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-109345.json)