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.

References

• https://github.com/laurent22/joplin/blob/af5108d70233b1db9410346958c1587cf7c1b16d/packages/onenote-converter/renderer/src/page/embedded_file.rs#L13-L16
• https://github.com/laurent22/joplin/commit/791668455e1aae50501ff57ea4783b3fba9d377c
• https://github.com/laurent22/joplin/pull/13736
• https://github.com/laurent22/joplin/releases/tag/v3.5.7
• https://github.com/laurent22/joplin/security/advisories/GHSA-gcmj-c9gg-9vh6