Koel: Server-Side Request Forgery (SSRF) in radio station creation due to missing validation bail
CVE-2026-50552

6.3MEDIUM

Key Information:

Vendor

Koel

Status
Koel
Vendor
CVE Published:
12 June 2026

What is CVE-2026-50552?

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 Version(s)

koel < 9.7.1

References

https://github.com/koel/koel/security/advisories/GHSA-jr4...
x_refsource_CONFIRM
https://github.com/koel/koel/commit/5f6ce2cefd08f437a2692...
x_refsource_MISC

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.