CVE-2026-59816

4.3 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-23

AI risk analysis

Summary: The flaw allows an authenticated user to exploit URL-encoded slashes and parent-directory segments in job IDs to access internal transcription-backend endpoints, potentially exposing sensitive data.
Exploitability: Exploitation requires authentication and knowledge of specific URL patterns; difficult but feasible with proper reconnaissance.
Blast radius: If exploited, it could lead to exposure of internal administrative or configuration data accessible by authenticated users.
Prioritized remediation: Update Joplin Server instances to version 3.7.7 or later to mitigate the risk.

auth-requireddata-exposureweb

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

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

Weaknesses

CWE-22

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.