Vulnerability Description
gonic is a music streaming server / free-software subsonic server API implementation. The maintainer's fix in commit `6dd71e6a3c966867ef8c900d359a7df75789f410` added an ownership check based on `playlist.UserID`. However, `playlist.UserID` is derived from the first path segment of the attacker-controlled playlist ID, with no path containment on the resolved file path. Any authenticated Subsonic user can therefore bypass the ownership check and read any other user's playlist, delete any other user's playlist, and probe arbitrary file paths on the host for existence/readability. This is a bypass of the boundary the `6dd71e6` fix is trying to enforce; it is closely related to the original GONIC-1 IDOR but uses a different primitive (path traversal in the `id` parameter rather than direct cross-user access). Commit 0824bed88f6bbc490ba28bf09d28e5dfeb07b445 in version 0.21.0 fixes the issue.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/sentriz/gonic/commit/0824bed88f6bbc490ba28bf09d28e5dfeb07b445
- https://github.com/sentriz/gonic/commit/6dd71e6
- https://github.com/sentriz/gonic/security/advisories/GHSA-2fp4-5v5c-4448
- https://github.com/sentriz/gonic/security/advisories/GHSA-2fp4-5v5c-4448
FAQ
What is CVE-2026-49339?
CVE-2026-49339 is a vulnerability with a CVSS score of 7.1 (HIGH). gonic is a music streaming server / free-software subsonic server API implementation. The maintainer's fix in commit `6dd71e6a3c966867ef8c900d359a7df75789f410` added an ownership check based on `play...
How severe is CVE-2026-49339?
CVE-2026-49339 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49339?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.