Medium severity · published Oct 12, 2026
CVE-2026-109344
DOMPurify from 3.4.13 before 3.4.16 DOM XSS via IN_PLACE afterSanitize Hooks
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DO
DOMPurify · cure53
3.4.13 before 3.4.16 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109344
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109344
vendor-advisory
https://github.com/cure53/DOMPurify/security/advisories/GHSA-p98j-92pf-mc4p
third-party-advisory
https://www.vulncheck.com/advisories/dompurify-from-3.4.13-before-3.4.16-dom-xss-via-in-place-aftersanitize-hooks
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