What is GHSA-c8x8-7fp4-3x9w?

GHSA-c8x8-7fp4-3x9w is a security advisory published by GitHub Security Advisories with High severity. ProseMirror has a XSS vulnerability in prosemirror-view's paste handling

Which CVE IDs does GHSA-c8x8-7fp4-3x9w cover?

GHSA-c8x8-7fp4-3x9w covers the following CVE IDs: CVE-2026-104847. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-c8x8-7fp4-3x9w?

GHSA-c8x8-7fp4-3x9w affects 1 product, including: npm/prosemirror-view:\u003c 1.42.3.

GHSA-c8x8-7fp4-3x9wHigh

ProseMirror has a XSS vulnerability in prosemirror-view's paste handling

Vendor

GitHub Security Advisories

Published

October 5, 2026

Last Modified

October 5, 2026

🔗 CVE IDs covered (1)

CVE-2026-104847 →

📋 Description

Impact

When a user pastes attacker-provided HTML into a ProseMirror editor component, this can cause attacker-controlled JavaScript code to run in the browser window containing the editor.

Patches

Version 1.42.3 adds validation that prevents this attack.

Workarounds

No known workarounds.

🎯 Affected products1

npm/prosemirror-view:< 1.42.3

🔗 References (5)

https://github.com/ProseMirror/prosemirror-view/security/advisories/GHSA-c8x8-7fp4-3x9w
https://nvd.nist.gov/vuln/detail/CVE-2026-104847
https://github.com/ProseMirror/prosemirror-view/commit/20dc0a911a79f8fc6640dbbea5e7d68d3c4784b7
https://github.com/ProseMirror/prosemirror-view/commit/2e91a612bbc1248e55b4f6061fc93fe459f977c1
https://github.com/advisories/GHSA-c8x8-7fp4-3x9w