Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109344DOMPurify from 3.4.13 before 3.4.16 DOM XSS via IN_PLACE afterSanitize Hooks

Medium 6.1

In plain English

A medium-severity cross-site scripting in DOMPurify from cure53. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.1Medium

Exploit odds (30 days)0.2%top 91.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

DOMPurify from 3.4.13 before 3.4.16 contains a cross-site scripting vulnerability because IN_PLACE mode fails to neutralize subtrees detached by afterSanitizeElements or afterSanitizeAttributes hooks. Attackers can supply markup with on* handlers inside a wrapper removed by such hooks, leaving handlers armed on the live DOM to execute script in the victim origin.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	node-dompurify	no fix listed	DEBIAN-CVE-2026-109344
Debian:13	node-dompurify	no fix listed	DEBIAN-CVE-2026-109344
Debian:14	node-dompurify	3.4.16+dfsg-1	DEBIAN-CVE-2026-109344
Ubuntu:22.04:LTS	node-dompurify	no fix listed	UBUNTU-CVE-2026-109344
Ubuntu:24.04:LTS	node-dompurify	no fix listed	UBUNTU-CVE-2026-109344
Ubuntu:26.04:LTS	node-dompurify	no fix listed	UBUNTU-CVE-2026-109344
Ubuntu:26.10	node-dompurify	no fix listed	UBUNTU-CVE-2026-109344
npm	dompurify	3.4.16	GHSA-p98j-92pf-mc4p

Affected products (as reported)

Vendor	Product	Versions
cure53	DOMPurify	3.4.13 – before 3.4.16

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-p98j-92pf-mc4p) vendor-advisory
VulnCheck Advisory: DOMPurify from 3.4.13 before 3.4.16 DOM XSS via IN_PLACE afterSanitize Hooks third-party-advisory