GHSA-c8x8-7fp4-3x9w
ProseMirror has a XSS vulnerability in prosemirror-view's paste handling
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | prosemirror-view | < 1.42.3 | 1.42.3 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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.
References
External links from the advisory. They lead to third-party sites.
- 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