What is GHSA-77h4-4vqj-j7vc?

GHSA-77h4-4vqj-j7vc is a security advisory published by GitHub Security Advisories with Medium severity. DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to...

Which CVE IDs does GHSA-77h4-4vqj-j7vc cover?

GHSA-77h4-4vqj-j7vc covers the following CVE IDs: CVE-2026-116803. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-77h4-4vqj-j7vc?

GHSA-77h4-4vqj-j7vc has a CVSS v3 base score of 6.1, published by GitHub Security Advisories.

GHSA-77h4-4vqj-j7vcMediumCVSS 6.1

DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to...

Vendor

GitHub Security Advisories

Published

October 27, 2026

Last Modified

October 27, 2026

🔗 CVE IDs covered (1)

CVE-2026-116803 →

📋 Description

DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to keep event handlers armed when an IN_PLACE hook removes a parent or sibling node. Attacker markup in detached subtrees is never walked or neutralized, so handlers like img onerror fire after sanitize() returns, causing DOM XSS.

🔗 References (4)

https://github.com/cure53/DOMPurify/security/advisories/GHSA-mrv2-3pqr-j5jr
https://nvd.nist.gov/vuln/detail/CVE-2026-116803
https://www.vulncheck.com/advisories/dompurify-before-3.4.17-dom-xss-via-in-place-hook-detached-subtrees
https://github.com/advisories/GHSA-77h4-4vqj-j7vc