Note Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS

• CVE-2026-50554: 0.42% estimated exploitation activity in the next 30 days; percentile 36.04 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary 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 "ownerid = ? OR ispublic = ?". 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. Affected component (code-verified) backend/services/notes.go — GetNotesByBookID (lines 72-89): func (s NotesService) GetNotesByBookID(currentUserID uuid.UUID, bookID uuid.UUID, deleted bool) ([]db.Note, error) { tx := db.DB if deleted { tx = tx.Unscoped() // <-- bypasses soft-delete scope } tx = tx. Preload("Book"). Joins("JOIN books ON books.id = notes.bookid"). Where( db.DB.Where("books.id = ?", bookID), db.DB.Where("ownerid = ? OR ispublic = ?", currentUserID, true), // <--…

Published by the source

9 Jul 2026, 13:41 UTC

Last modified by the source

9 Jul 2026, 13:41 UTC

Source last checked

26 Oct 2026, 15:24 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-588f-fvcv-xhvf

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# Patch Next advisory brief: CVE-2026-50554

Advisory: Note Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books
IDs: CVE-2026-50554, GHSA-588f-fvcv-xhvf
Record: https://patchnext.com/advisories/cve-2026-50554 (revision 1, source checked 26 Oct 2026, 15:24 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/enchant97/note-mark/backend 0.0.0-20260601210758-9c9b72740f22. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/enchant97/note-mark/backend: affected < 0.0.0-20260601210758-9c9b72740f22; fixed in 0.0.0-20260601210758-9c9b72740f22

## Suggested inspection (read-only)
- Go github.com/enchant97/note-mark/backend: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/enchant97/note-mark/backend.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-588f-fvcv-xhvf (GitHub-reviewed advisory GHSA-588f-fvcv-xhvf lists affected ranges: Go github.com/enchant97/note-mark/backend >=0 <0.0.0-20260601210758-9c9b72740f22)

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