CVE-2026-23877: Directory Traversal & Filesystem can be accessed by a non-admin user

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-19 · updated 2026-06-17
Weakness: CWE-25

Description

Swing Music is a self-hosted music player for local audio files. Prior to version 2.1.4, Swing Music's `list_folders()` function in the `/folder/dir-browser` endpoint is vulnerable to directory traversal attacks. Any authenticated user (including non-admin) can browse arbitrary directories on the server filesystem. Version 2.1.4 fixes the issue.

Affected products

swingmx swingmusic: before 2.1.4 — fixed in 2.1.4

How to fix

Upgrade to a fixed version: swingmx swingmusic 2.1.4. Check the vendor advisory for mitigations.

References

https://github.com/swingmx/swingmusic/commit/9a915ca62af1502b9550722df82f5d432cb73de3
https://github.com/swingmx/swingmusic/security/advisories/GHSA-pj88-9xww-gxmh

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