CVE-2026-49453 — Joplin: Path traversal in resource sync — silent arbitrary file write outside the resource directory

Description (CNA)

Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.6.15 and 3.7.2, Joplin accepts synchronized resource metadata whose id or file_extension contains parent-directory or path-separator characters. BaseItem.unserialize() stores the unvalidated fields, resourceFilename() concatenates them into a destination path, and ResourceFetcher writes the attacker-controlled resource blob outside the resource directory during background synchronization. An attacker with write access to a configured sync target or shared notebook can create or overwrite files at an attacker-chosen existing path without user interaction. This issue is fixed in versions 3.6.15 and 3.7.2.

Affected (CNA)

Vendor / product	Versions
laurent22 / joplin	affected < 3.6.15; affected >= 3.7.0, < 3.7.2

CWE

CWE-20, CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/laurent22/joplin/security/advisories/GHSA-r24r-gp6h-cwgf