CVE-2026-55179 Joplin: Logic error in Joplin Server allows a signed-in user to read any note from its internal server ID
An authenticated user can read any note content by guessing internal IDs due to missing ownership checks in Joplin Server.
- 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-2026-55179?
CVE-2026-55179 is a medium-severity missing authorization 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 3.7.2, Joplin Server's GET /items/:id/content route in packages/server/src/routes/index/items.ts loads item content from an attacker-supplied internal server ID without checking whether the signed-in user owns or can access that item. Any authenticated user who obtains or guesses another user's item ID can read the corresponding note or item content when end-to-end encryption does not protect it. This issue is fixed in version 3.7.2.
Weakness: CWE-639
Which versions are affected by CVE-2026-55179?
How do I fix CVE-2026-55179?
No fix has been published for CVE-2026-55179 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55179 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55179 exists.
Sources
Also known as GHSA-r865-g55x-3mfc.