CVE-2026-50554 Note Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books in note-mark
Unauthenticated attackers can view metadata of soft-deleted notes in public books by exploiting an API parameter that bypasses soft-delete scoping.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-50554?
CVE-2026-50554 is a medium-severity vulnerability in enchant97 note-mark, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Note Mark is an open-source note-taking application. Prior to version 0.19.5, GET /api/books/{bookID}/notes is an unauthenticated endpoint that accepts a "deleted" query parameter. When the request is ?deleted=true, the service runs the query with Unscoped() (bypassing GORM's soft-delete scope) but keeps the read-authorization clause as "owner_id = ? OR is_public = ?". As a result, any unauthenticated caller can enumerate the metadata of soft-deleted ("trashed") notes belonging to any public book — notes the owner explicitly deleted and expected to be removed from public view. This issue has been patched in version 0.19.5.
Which versions are affected by CVE-2026-50554?
3 open source packages ship an affected version, including github.com/enchant97/note-mark/backend.
| Package | Affected | Fixed in |
|---|---|---|
github.com/enchant97/note-mark/backend Go | All versions | 0.0.0-20260601210758-9c9b72740f22 |
github.com/enchant97/note-mark/backend Go | All versions | 0.0.0-20260601210758-9c9b72740f22 |
github.com/enchant97/note-mark/backend Go | All versions | 0.0.0-20260601210758-9c9b72740f22 |
How do I fix CVE-2026-50554?
Upgrade github.com/enchant97/note-mark/backend to 0.0.0-20260601210758-9c9b72740f22 or later.
Is CVE-2026-50554 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50554 exists.
Sources
Also known as GHSA-588f-fvcv-xhvf, GO-2026-5948.