CVE-2026-54494

Koel is a free, open-source music streaming solution. Prior to 9.7.1, App\Helpers\Network::isPublicHost() uses filter_var() with FILTER_FLAG_NO_PRIV_RANGE and FILTER_FLAG_NO_RES_RANGE, which treats NAT64 64:ff9b::/96 and 6to4 2002::/16 wrappers of private, loopback, or link-local IPv4 addresses as public. An authenticated user can place such an address in a podcast RSS <enclosure url> and reach app/Values/Podcast/EpisodePlayable.php through EpisodePlayable::createForEpisode(), where isSafeUrl() accepts the target and Http::sink($file)->get($url) fetches it. On a host with NAT64 or 6to4 routing, Koel can request internal services or cloud metadata and return the response body to the user. This issue is fixed in version 9.7.1

• CWE-918

• https://github.com/koel/koel/commit/5f6ce2cefd08f437a269236b677ad971517ccbb6
• https://github.com/koel/koel/pull/2549
• https://github.com/koel/koel/releases/tag/v9.7.1
• https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2
• https://github.com/koel/koel/security/advisories/GHSA-rjg7-r26h-cfp2

Published

Aug 19, 2026

Last Modified

Sep 9, 2026

Status

Deferred

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