CVE-2026-59816 Joplin: Path traversal in transcribe proxy endpoint via URL-encoded slash
An authenticated user can exploit path traversal in the transcribe proxy to access internal administrative or configuration data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59816?
CVE-2026-59816 is a medium-severity path traversal vulnerability in laurent22 joplin, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Joplin is an open source note-taking and to-do application that organises notes and lists into notebooks. Prior to 3.7.7, the GET /api/transcribe/:id and POST /api/transcribe/:id handlers in packages/server/src/routes/api/transcribe.ts on Joplin Server instances with TRANSCRIBE_ENABLED=true pass the decoded id directly into transcription backend URLs. An authenticated user can place URL-encoded slash and parent-directory segments in the job ID, causing parseSubPath() to decode a path that escapes the intended /transcribe/ prefix. The server then proxies the request to other transcription-backend endpoints and can return their responses, potentially exposing internal administrative, health, or configuration data. This issue is fixed in version 3.7.7.
Weakness: CWE-22
Which versions are affected by CVE-2026-59816?
How do I fix CVE-2026-59816?
No fix has been published for CVE-2026-59816 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-59816 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59816 exists.
Sources
Also known as GHSA-r7wp-3494-fwf4.