CVE-2026-104847
ProseMirror: XSS vulnerability in prosemirror-view's paste handling
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
ProseMirror's view component renders and manages the editable browser interface for ProseMirror documents. Prior to 1.42.3, prosemirror-view paste handling accepts attacker-provided HTML whose clipboard slice context contains attributes that are not passed through schema attribute validation. When a user pastes the crafted HTML into an editor, the unvalidated context attributes can construct content that executes attacker-controlled JavaScript in the browser window containing the editor. This issue is fixed in version 1.42.3.
| CWE | CWE-79 |
| Vendor | prosemirror |
| Product | prosemirror-view |
| Published | Oct 2, 2026 |
| Last Updated | Oct 2, 2026 |
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Affected Versions
ProseMirror / prosemirror-view
< 1.42.3
References
github.com: https://github.com/ProseMirror/prosemirror-view/security/advisories/GHSA-c8x8-7fp4-3x9w github.com: https://github.com/ProseMirror/prosemirror-view/commit/20dc0a911a79f8fc6640dbbea5e7d68d3c4784b7 github.com: https://github.com/ProseMirror/prosemirror-view/commit/2e91a612bbc1248e55b4f6061fc93fe459f977c1