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CVE-2026-47423

DOMPurify XSS via `selectedcontent` re-clone

HIGH

8.2

CVSS Score

Published: July 14, 2026 at 07:56 PM UTC

Updated: October 24, 2026 at 09:10 PM UTC

1 product affected across 1 vendorDOMPurify

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Severity

HIGH8.2

Exploit prediction

EPSS 0.4%

SSVC

PoC

Description

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

DOMPurify · CURE53npm

95%

Affected range stops below 3.4.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_CONFIRMExploitVendor Advisory

Source: cverecord

https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx

x_refsource_MISCPatch

Source: cverecord

https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea

x_refsource_MISCRelease Notes

Source: cverecord

https://github.com/cure53/DOMPurify/releases/tag/3.4.5

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: CHANGED
Confidentiality: HIGH
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-79

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