Security Advisory

CVE-2026-49340

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-06-19 19:11:20

Last updated 2026-06-22 17:50:57

Assigner GitHub_M

CVSS score 8.1

State PUBLISHED

Description

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.

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