What is CVE-2026-23877?

CVE-2026-23877 is a medium-severity vulnerability in Swingmx Swing Music, classified under CWE-25. CVSS score: 4.3/10. Published 2026-01-19.

How severe is CVE-2026-23877?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Swingmx Swing Music

CVE-2026-23877

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.

Published 2026-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.006 (47.4th percentile), scored 2026-10-18.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 47.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Swingmx Swing Music
Swingmx Swingmusic — versions < 2.1.4

Weakness classification (CWE)

References

github.com/swingmx/swingmusic/security/advisories/GHSA-pj88-9xww-gxmh (Exploit, Vendor Advisory)
github.com/swingmx/swingmusic/commit/9a915ca62af1502b9550722df82f5d432cb73de3 (Patch)

Frequently asked questions

What is CVE-2026-23877?: CVE-2026-23877 is a medium-severity vulnerability in Swingmx Swing Music, classified under CWE-25. CVSS score: 4.3/10. Published 2026-01-19.
How severe is CVE-2026-23877?: Medium severity. CVSS v3 base score is 4.3 out of 10.