CVE-2026-49340 PUBLISHED

gonic has arbitrary file write in createPlaylist: any authenticated user can write playlist M3U content to attacker-controlled path on the host

Assigner: GitHub_M
Reserved: 29.05.2026 Published: 19.06.2026 Updated: 19.06.2026

gonic is a music streaming server / free-software subsonic server API implementation. Prior to version 0.21.0, a logic error in ServeCreateOrUpdatePlaylist allows any authenticated Subsonic user (including non-admin) to write playlist M3U content to an attacker-controlled absolute filesystem path on the gonic host, and to create intermediate directories with 0o777 permissions. The bug is independent of CVE-2026-49338 and CVE-2026-49339. It is an unreachable guard clause combined with no path containment in Store.Write. Version 0.21.0 patches the issue.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CVSS Score: 8.1

Product Status

Vendor sentriz
Product gonic
Versions
  • Version < 0.21.0 is affected

References

Problem Types

  • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE
  • CWE-697: Incorrect Comparison CWE
  • CWE-732: Incorrect Permission Assignment for Critical Resource CWE