Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109345DOMPurify before 3.4.16 XSS via IN_PLACE Returned Rawtext Root
Medium 6.1
In plain English
A medium-severity cross-site scripting in DOMPurify from cure53. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | node-dompurify | no fix listed | DEBIAN-CVE-2026-109345 |
| Debian:13 | node-dompurify | no fix listed | DEBIAN-CVE-2026-109345 |
| Debian:14 | node-dompurify | 3.4.16+dfsg-1 | DEBIAN-CVE-2026-109345 |
| Ubuntu:22.04:LTS | node-dompurify | no fix listed | UBUNTU-CVE-2026-109345 |
| Ubuntu:24.04:LTS | node-dompurify | no fix listed | UBUNTU-CVE-2026-109345 |
| Ubuntu:26.04:LTS | node-dompurify | no fix listed | UBUNTU-CVE-2026-109345 |
| Ubuntu:26.10 | node-dompurify | no fix listed | UBUNTU-CVE-2026-109345 |
| npm | dompurify | 3.4.16 | GHSA-6688-9rhm-gjv2 |
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-6688-9rhm-gjv2) vendor-advisory
- VulnCheck Advisory: DOMPurify before 3.4.16 XSS via IN_PLACE Returned Rawtext Root third-party-advisory