CVE-2026-0540
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
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Mixed 4 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 3.3.2+dfsg-1 |
| forky | Fixed | 3.3.2+dfsg-1 |
| bookworm | 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
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.