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CVE-2026-75838

DOMPurify before 3.4.13 Cross-Site Scripting via IN_PLACE hook

MEDIUM
5.1
CVSS Score
Published: August 18, 2026 at 11:19 AM UTC
Updated: October 22, 2026 at 10:10 PM UTC
1 product affected across 1 vendorDOMPurify

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Severity
MEDIUM5.1
Exploit prediction
EPSS 0.4%
SSVC
PoC

Description

DOMPurify before 3.4.13 contains a cross-site scripting vulnerability in IN_PLACE sanitization where element-removal hooks fail to neutralize detached subtrees. Attackers can supply HTML with event handlers on descendant elements that execute after sanitization completes, even though the returned root appears clean.

Affected

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

DOMPurify· CURE53npm
90%
0 ≤ v < 3.4.130
Vendor states this is fixed in 3.4.13 (unaffected)

Remediation

No guide yet

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

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/cure53/DOMPurify/security/advisories/GHSA-55q2-fjhq-7xh7
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/dompurify-before-cross-site-scripting-via-in-place-hook

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

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

CVSS

5.1MEDIUMVulnCheck
Vector?

Quick Info

StatusAWAITING ANALYSIS
CWE
CWE-79

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