Vulnerability Description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.7, Joplin Server's GET /shares/:id?resource_id= route serves a resource with the attacker-controlled mime value and omits Content-Disposition when the resource title is empty. A low-privileged user can publish an empty-title image/svg+xml attachment whose script executes when a victim opens the public share. By default, user content shares the Joplin Server application origin, allowing the script to access same-origin data and, when the victim is authenticated, perform actions with the victim's session, including reading administrative data and anti-CSRF tokens. Installations that configure USER_CONTENT_BASE_URL to a separate origin still execute the script, but on that separate user-content origin rather than the application origin. This issue is fixed in version 3.7.7.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/laurent22/joplin/commit/920cd8f463bf9bbce9daa0758167612300711
- https://github.com/laurent22/joplin/pull/15787
- https://github.com/laurent22/joplin/security/advisories/GHSA-mx98-7h4g-6gmh
- https://github.com/laurent22/joplin/security/advisories/GHSA-mx98-7h4g-6gmh
FAQ
What is CVE-2026-59814?
CVE-2026-59814 is a vulnerability with a CVSS score of 7.6 (HIGH). Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.7, Joplin Server's GET /shares/:id?resource_id= route serves a resource with the ...
How severe is CVE-2026-59814?
CVE-2026-59814 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59814?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.