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.
History

Sun, 04 Oct 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Prosemirror
Prosemirror prosemirror-view
Vendors & Products Prosemirror
Prosemirror prosemirror-view

Fri, 02 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 02 Oct 2026 16:15:00 +0000

Type Values Removed Values Added
Description 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.
Title ProseMirror: XSS vulnerability in prosemirror-view's paste handling
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 8.5, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-02T16:02:42.475Z

Updated: 2026-10-02T16:57:44.659Z

Reserved: 2026-10-02T14:38:43.243Z

Link: CVE-2026-104847

cve-icon Vulnrichment

Updated: 2026-10-02T16:57:39.636Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-02T16:16:47.410

Modified: 2026-10-02T18:44:11.270

Link: CVE-2026-104847

cve-icon Redhat

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