Medium severity · published Apr 23, 2026
CVE-2026-41239
DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode
6.8
CVSS
0.2%
EPSS
No
On KEV
Description
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, `SAFE_FOR_TEMPLATES` strips `{{...}}` expressions from untrusted HTML. This works in string mode but not with `RETURN_DOM` or `RETURN_DOM_FRAGMENT`, allowing XSS via template-evaluating frameworks like Vue 2. Version 3.4.0 patches the issue.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DO
DOMPurify · cure53
>= 1.0.10, < 3.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-41239
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-41239
github.com
https://github.com/cure53/DOMPurify/releases/tag/3.4.0
github.com
https://github.com/cure53/DOMPurify/security/advisories/GHSA-crv5-9vww-q3g8
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