@joplin/onenote-converter: Path traversal in OneNote importer allows overwriting arbitrary files — CVE-2026-22810

Summary

### Summary A path traversal vulnerability in the OneNote importer allows overwriting arbitrary files on disk. ### Details 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…

Product

npm: @joplin/onenote-converter

What to do

General, cautious steps (verify details in the official source):

• Prioritize patching or mitigation immediately (treat as actively risky).
• Identify affected product versions in your inventory and verify whether you are impacted.
• Apply vendor patches/updates or recommended mitigations as soon as available.
• Read the official advisory for exact affected versions and remediation steps.

Official advisory

• Read the official source
• CVE Record
• NVD

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