Koel up to 9.6.9 Subsonic Podcast Channel PodcastService.php Poddle::fromUrl server-side request forgery

Summaryinfo

A vulnerability, which was classified as problematic, was found in Koel up to 9.6.9. Affected by this issue is the function Poddle::fromUrl of the file app/Services/Podcast/PodcastService.php of the component Subsonic Podcast Channel. Such manipulation leads to server-side request forgery. This vulnerability is documented as CVE-2026-54492. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Koel up to 9.6.9. It has been rated as problematic. Affected by this issue is the function Poddle::fromUrl of the file app/Services/Podcast/PodcastService.php of the component Subsonic Podcast Channel. The manipulation with an unknown input leads to a server-side request forgery vulnerability. Using CWE to declare the problem leads to CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Impacted is confidentiality. CVE summarizes:

Koel is a free, open-source music streaming solution. Prior to 9.7.0, the Subsonic-compatible createPodcastChannel.view route accepts an authenticated user's private URL because app/Http/Requests/Subsonic/CreatePodcastChannelRequest.php does not apply the SafeUrl validation used by the regular podcast API. app/Http/Controllers/Subsonic/CreatePodcastChannelController.php passes the URL to app/Services/Podcast/PodcastService.php, where PodcastService::addPodcast() and createParser() invoke Poddle::fromUrl() during channel creation, causing immediate server-side requests to loopback, Docker bridge, or RFC1918 HTTP destinations. The confirmed impact is blind internal request execution because generic response-body exfiltration was not demonstrated through this route. This issue is fixed in version 9.7.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-54492 since 06/15/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

By approaching the search of inurl:app/Services/Podcast/PodcastService.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 9.7.0 eliminates this vulnerability.

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Productinfo

Name

• Koel

Version

• 9.6.0
• 9.6.1
• 9.6.2
• 9.6.3
• 9.6.4
• 9.6.5
• 9.6.6
• 9.6.7
• 9.6.8
• 9.6.9

Website

• Product: https://github.com/koel/koel/

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