CVE-2026-49340

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

State: Published
Severity: 8.1 High
Published: Jun 19, 2026
Updated: Jun 22, 2026
Reserved: May 29, 2026

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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.

Scores

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

Weaknesses

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

Affected Products

Product	Versions
gonicsentriz	< 0.21.0Affected

References

https://github.com/sentriz/gonic/security/advisories/GHSA-4gxv-p5g5-j7w7

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