CVE-2026-49340

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) gonic es un servidor de streaming de música / implementación de API de servidor Subsonic de software libre. Antes de la versión 0.21.0, un error lógico en “ServeCreateOrUpdatePlaylist” permite a cualquier usuario Subsonic autenticado (incluidos los no administradores) escribir contenido M3U de listas de reproducción en una ruta absoluta del sistema de archivos controlada por un atacante en el host de gonic, y crear directorios intermedios con permisos “0o777”. El error es independiente de CVE-2026-49338 y CVE-2026-49339. Es una cláusula de guarda inalcanzable combinada con la ausencia de contención de ruta en “Store.Write”. La versión 0.21.0 corrige el problema.

Information

Published : 2026-06-19 19:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-49340

Mitre link : CVE-2026-49340

CVE.ORG link : CVE-2026-49340

JSON object : View

Products Affected

No product.

CWE

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

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