CVE-2026-0540
MEDIUM6.1EPSS 0.01%DOMPurify contains a Cross-site Scripting vulnerability
Published: 3/3/2026Modified: 4/28/2026
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.
Affected packages (2)
- Debian/node-dompurifyfrom 0
- npm/dompurify>= 3.1.3, < 3.3.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N |
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-0540
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-0540
- PATCHhttps://github.com/cure53/DOMPurify
- WEBhttps://fluidattacks.com/advisories/daft
- WEBhttps://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
- WEBhttps://github.com/cure53/DOMPurify/commit/fca0a938b4261ddc9c0293a289935a9029c049f5
- WEBhttps://github.com/cure53/DOMPurify/releases/tag/3.3.2
- WEBhttps://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml