CVE-2026-104847NVD

Vulnerability Summary

### 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.

Severity Level

HIGH(8.5)

Published Date

Oct 2, 2026

Last Modified

Oct 5, 2026

Exploitation Status

No confirmed exploitation yet

CVE Record Status

Published

EPSS Score (30-Day)

0.31%Probability

Root Weakness (CWE)

CWE-79: Cross-site Scripting (XSS) ↗

The software does not neutralize user-controllable input before it is placed in output that is used as a web page.

CVSS v4.0 Base Metrics — Score 8.5

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredNone

User InteractionActive

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)None

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

prosemirror-view < 1.42.3

Patched Versions

Not provided by Private for this CVE.

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