CVE-2026-49340: Sentriz Gonic

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Sentriz Gonic: before 0.21.0 (fixed in 0.21.0)

Published 2026-06-19. Last modified 2026-06-23.