CVE-2026-54493: Koel: Authenticated Full-Read SSRF via Subsonic Internet Radio Stations

Summary Koel v9.6.0 validates radio station URLs on the regular web API, but the Subsonic-compatible radio endpoints do not apply the same SSRF protections. An authenticated user can create or update a radio station wit…

7.7CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-54493
Vendor	composer
Affected Product	phanan/koel
Vulnerability Type	Vulnerability
CVSS Score	7.7 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

Summary

Koel v9.6.0 validates radio station URLs on the regular web API, but the Subsonic-compatible radio endpoints do not apply the same SSRF protections. An authenticated user can create or update a radio station with a private URL and then use Koel's radio streaming feature to make the server fetch that URL and return the upstream response body. This was validated against v9.6.0 (352ea5ec27fa22294da8fb6beacb3d5552f0d09c) using the official phanan/koel:9.6.0 image.

Details

SafeUrl is applied on the web API, but not on the Subsonic endpoints Koel's regular radio API protects station URLs with `SafeUrl` and `HasAudioContentType`: - `app/Http/Requests/API/Radio/RadioStationStoreRequest.php`

• app/Http/Requests/API/Radio/RadioStationUpdateRequest.php ```php

new SafeUrl(), new

🎯 Known Indicators of Compromise

{"type":"sha1","value":"352ea5ec27fa22294da8fb6beacb3d5552f0d09c","confidence_score":0.9,"first_seen":"2026-07-15","source_count":1}

📚 Advisory References

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