prosemirror/prosemirror-view · Security
ProseMirror has a XSS vulnerability in prosemirror-view's paste handling
- GHSA ID
- GHSA-c8x8-7fp4-3x9w
- CVE ID
- CVE-2026-104847
- Severity
- high
- Published
- Updated
- CVSS v4
- 8.5 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
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.
CWEs
- CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
References
- 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 ↗