CVE-2026-50552: Koel

Medium severity, CVSS 6.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Koel is a free, open-source music streaming solution. Prior to version 9.7.1, Koel contains a Server-Side Request Forgery (SSRF) vulnerability in the radio station creation endpoint (POST /api/radio/stations). The url field validation rules are declared without the bail keyword, so the HasAudioContentType rule — which issues HTTP requests to the supplied URL — still executes even after the SafeUrl rule has rejected the URL as pointing to a private/reserved address. Any authenticated, non-admin user can therefore coerce the server into making HEAD/GET requests to arbitrary internal hosts. This issue has been patched in version 9.7.1.

Affected products

• Koel Koel: before 9.7.1 (fixed in 9.7.1)

Published 2026-06-12. Last modified 2026-06-17.