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CVE-2026-50552 koel CVE debrief

CVE-2026-50552 is a Server-Side Request Forgery (SSRF) vulnerability in Koel, a free, open-source music streaming solution. The vulnerability affects Koel prior to version 9.7.1. The SSRF vulnerability is located in the radio station creation endpoint (POST /api/radio/stations). The url field validation rules are declared without the bail keyword, allowing the HasAudioContentType rule to execute even after the SafeUrl rule has rejected the URL as pointing to a private/reserved address. This allows any authenticated, non-admin user to coerce the server into making HEAD/GET requests to arbitrary internal hosts.

Vendor
koel
Product
Unknown
CVSS
MEDIUM 6.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

Who should care

Users of Koel prior to version 9.7.1 should apply the patch to prevent exploitation of this vulnerability.

Technical summary

The vulnerability has a CVSS score of 6.3 and a severity of MEDIUM. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L. The weakness is classified as CWE-918.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to Koel version 9.7.1 or later.
  • Restrict access to the radio station creation endpoint to admin users only.
  • Implement additional security measures to detect and prevent SSRF attacks.

Evidence notes

The vulnerability was patched in version 9.7.1. References: [ref-4](https://github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517ccbb6), [ref-5](https://github.com/koel/koel/security/advisories/GHSA-jr4p-4xjh-fwvw).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-50552 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-50552

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-50552 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-50552

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.