CVE-2026-0540
DOMPurify XSS via Missing Rawtext Elements in SAFE_FOR_XML
- State
- Published
- Severity
- 5.3 Medium
- Published
- Mar 3, 2026
- Updated
- Mar 25, 2026
- Reserved
- Dec 27, 2025
Description
DOMPurify 3.1.3 through 3.3.1 and 2.5.3 through 2.5.8, fixed in commit 2726c74, 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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | Fluid Attacks |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | Fluid Attacks |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
DOMPurifycure53 |
|
References
- DOMPurify GitHub Repositoryproduct
- https://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80patch
- VulnCheck Advisory: DOMPurify XSS via Missing Rawtext Elements in SAFE_FOR_XMLrelease-notes
- https://fluidattacks.com/advisories/daftthird-party-advisory
- https://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xmlthird-party-advisory
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