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Vulnerability record · CVE-2026-105784 · published 6 October 2026

CVE-2026-105784: Cross-site scripting vulnerability

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.13, selecting a note containing a jsoncanvas fence causes the whiteboard text and file-node components in packages/app-desktop/gui/NoteEditor/NoteBody/WhiteboardEditor/nodes/TextNode.tsx and packages/app-desktop/gui/NoteEditor/NoteBody/WhiteboardEditor/nodes/FileNode.tsx to render card content with the full Markdown renderer. The components insert the resulting HTML into the main application document through dangerouslySetInnerHTML. A malicious note can inject style elements and remote CSS imports that modify trusted application chrome, signal when the note is opened, and potentially disclose exposed attribute values. Content Security Policy blocks inline script execution, so the supported impact is CSS injection and UI redressing rather than code execution. This issue is fixed in version 3.7.13.

4.6 CVSS 3.1 Medium CWE-79 · Cross-site scripting Deferred
4.6CVSS 3.1 base score
-EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
6 Oct 2026Last modified by NVD

Description

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.13, selecting a note containing a jsoncanvas fence causes the whiteboard text and file-node components in packages/app-desktop/gui/NoteEditor/NoteBody/WhiteboardEditor/nodes/TextNode.tsx and packages/app-desktop/gui/NoteEditor/NoteBody/WhiteboardEditor/nodes/FileNode.tsx to render card content with the full Markdown renderer. The components insert the resulting HTML into the main application document through dangerouslySetInnerHTML. A malicious note can inject style elements and remote CSS imports that modify trusted application chrome, signal when the note is opened, and potentially disclose exposed attribute values. Content Security Policy blocks inline script execution, so the supported impact is CSS injection and UI redressing rather than code execution. This issue is fixed in version 3.7.13.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

References

LinkTags
https://github.com/laurent22/joplin/commit/7fb9ec93e47cec39a548a76e03d7ad660ca0f123
https://github.com/laurent22/joplin/pull/16275
https://github.com/laurent22/joplin/releases/tag/v3.7.13
https://github.com/laurent22/joplin/security/advisories/GHSA-6h4j-86j4-x4q4
https://github.com/laurent22/joplin/security/advisories/GHSA-6h4j-86j4-x4q4

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Source: NIST National Vulnerability Database (record CVE-2026-105784), CISA KEV, FIRST EPSS. This page is refreshed as NVD updates the record.