medium6.1
CVE-2026-0540
DOMPurify contains a Cross-site Scripting vulnerability
Impact
DOMPurify 3.1.3 through 3.3.1 and 2.5.3 through 2.5.8, fixed in 2.5.9 and 3.3.2, contain a cross-site scripting vulnerability that allows attackers to bypass attribute sanitization by exploiting five missing rawtext elements (noscript, xmp, noembed, noframes, iframe) in the `SAFE_FOR_XML` regex. Attackers can include payloads like `</noscript><img src=x onerror=alert(1)>` in attribute values to execute JavaScript when sanitized output is placed inside these unprotected rawtext contexts.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | dompurify | >= 3.1.3, <= 3.3.1 | 3.3.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cure53 | Dompurify | from 2.5.3 through 2.5.8 from 3.1.3 through 3.3.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://fluidattacks.com/advisories/daft
- https://github.com/cure53/DOMPurify
- https://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
- https://github.com/cure53/DOMPurify/releases/tag/3.3.2
- https://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml
- https://github.com/advisories/GHSA-v2wj-7wpq-c8vv
- https://nvd.nist.gov/vuln/detail/CVE-2026-0540
- https://github.com/cure53/DOMPurify/commit/fca0a938b4261ddc9c0293a289935a9029c049f5