ProseMirror has a XSS vulnerability in prosemirror-view's paste handling
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 software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | prosemirror-view | < 1.42.3 | 1.42.3 |
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/ProseMirror/prosemirror-view
- CVSS vector
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- Weakness (CWE)
CWE-79- Platform
- npm
- Package
prosemirror-view- Disclosed
- 05.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-c8x8-7fp4-3x9w - CC BY 4.0
Vulnerability history: prosemirror-view
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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