CVE-2026-0540
unknown
CVSS v3
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CVSS v2
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VIR risk
—
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.
Predictions
Exploit likelihood
30%
Patch ETA
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Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-0540
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | affected | |
| debian | forky | fixed | 3.3.2+dfsg-1 |
| debian | sid | fixed | 3.3.2+dfsg-1 |
| debian | trixie | affected | |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-0540
- https://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
- https://github.com/cure53/DOMPurify/commit/fca0a938b4261ddc9c0293a289935a9029c049f5
- https://fluidattacks.com/advisories/daft
- https://github.com/cure53/DOMPurify
- 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://security-tracker.debian.org/tracker/CVE-2026-0540
Verify integrity in audit chain (admin only). AS-IS.