CVE-2026-54492 Koel: Authenticated Blind SSRF via Subsonic Podcast Channel Creation
Authenticated attackers can trigger server-side requests to internal networks via the Subsonic podcast creation route, bypassing URL validation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54492?
CVE-2026-54492 is a medium-severity server-side request forgery vulnerability in koel, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-54492?
2 open source packages ship an affected version, including phanan/koel.
| Package | Affected | Fixed in |
|---|---|---|
phanan/koel Packagist | All versions | 9.7.0 |
phanan/koel Packagist | All versions | 9.7.0 |
How do I fix CVE-2026-54492?
Upgrade phanan/koel to 9.7.0 or later.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-54492 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54492 exists.
Sources
Also known as GHSA-w79m-f3jx-779v.