CVE-2026-22810
Description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Versions prior to 3.5.7 contain a path traversal vulnerability in the importer which allows overwriting arbitrary files on disk. The OneNote converter does not sanitize the names of embedded files before writing them to disk. As a result, it's possible for an attacker to create a malicious .one file that includes file names containing ../../, that are then interpreted as part of the target path when extracting attachments from the .one file. This issue has been patched in version 3.5.7.
How to fix
- joplinapp joplin3.5.7 or later
- @joplin/onenote-converter3.5.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| joplinapp joplin | v < 3.5.7 | 3.5.7 |
| msiemens one2html | v ≤ 1.3.0 | — |
| @joplin/onenote-converternpm | v < 3.5.7 | 3.5.7 |
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Attack Surface Management
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