CVE-2026-54491

01/Description

Koel is a free, open-source music streaming solution. Prior to 9.7.1, outbound podcast and radio fetch paths perform a point-in-time App\Helpers\Network::isPublicHost() or isSafeUrl() check without pinning the validated address, and most paths lack redirect-hop validation and do not revalidate every redirect target. PhanAn\Poddle\Poddle::fromUrl(), PodcastService::getStreamableUrl(), PodcastService::isPodcastObsolete(), App\Rules\HasAudioContentType, and App\Rules\SafeUrl can therefore follow an attacker-controlled redirect to an internal address or connect after DNS rebinding changes a public resolution to a private one. These paths are reachable through podcast and radio APIs, including createPodcastChannel, createInternetRadioStation, refreshPodcasts, apiResource podcasts, and radio/stations, allowing an authenticated user to request internal services or cloud metadata and potentially receive parsed or streamed response content. This issue is fixed in version 9.7.1.

02/References7

• github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517…
• github.com/koel/koel/commit/c264a3d52513a83b21e1cc3a20e895caea9…
• github.com/koel/koel/pull/2546
• github.com/koel/koel/pull/2549
• github.com/koel/koel/releases/tag/v9.7.1
• github.com/koel/koel/security/advisories/GHSA-6qvr-wjmv-v8mm
• github.com/koel/koel/security/advisories/GHSA-6qvr-wjmv-v8mm