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Vulnerability · Published May 18, 2026 · Assigned by GitHub_M

CVE-2026-22810Joplin: Path traversal in OneNote importer allows overwriting arbitrary files

High 8.2

In plain English

A high-severity security flaw in joplin from laurent22. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.2%top 89.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npm@joplin/onenote-converter3.5.7GHSA-gcmj-c9gg-9vh6

Affected products (as reported)

VendorProductVersions
laurent22 joplin < 3.5.7

Weakness: CWE-24 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

References