CVE-2026-41239: DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

April 22, 2026 (updated April 27, 2026)

Field	Value
Severity	Medium
Affected	DOMPurify `main` at `883ac15`, introduced in v1.0.10 (`7fc196db`)

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.

References

github.com/advisories/GHSA-crv5-9vww-q3g8
github.com/cure53/DOMPurify
github.com/cure53/DOMPurify/releases/tag/3.4.0
github.com/cure53/DOMPurify/security/advisories/GHSA-crv5-9vww-q3g8
nvd.nist.gov/vuln/detail/CVE-2026-41239

Code Behaviors & Features

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