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TI-2026-39338 Aliases CVE-2026-54492GHSA-w79m-f3jx-779v

Koel: Authenticated Blind SSRF via Subsonic Podcast Channel Creation

Priority MEDIUM 53CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00411 35th percentileScored 2026-11-07
Fix Fixed koel (koel): 9.7.0phanan/koel (Packagist): 9.7.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
koelkoelbefore 9.7.09.7.0Patch availableCNA
—phanan/koel (Packagist)before 9.7.09.7.0Patch availableGHSA-w79m-f3jx-779v
  • koel Vendorkoel Affected before 9.7.0 Fixed in 9.7.0 Patch available CNA
  • phanan/koel (Packagist) Vendor— Affected before 9.7.0 Fixed in 9.7.0 Patch available GHSA-w79m-f3jx-779v

Remediation

  • Fix · CNA koel (koel) Fixed in 9.7.0
  • Fix · GHSA-w79m-f3jx-779v phanan/koel (Packagist) Fixed in 9.7.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54492
  2. 2026-10-03 Alias added: GHSA-w79m-f3jx-779v

References

Other 5

  • TI-2026-39339 Koel: Authenticated Full-Read SSRF via Subsonic Internet Radio Stations CVSS 3.1HIGH 7.7
  • TI-2026-34840 Koel Vulnerable to SSRF via Podcast Episode Enclosure URLs CVSS 3.1HIGH 7.7
  • TI-2026-39337 Koel: Incomplete fix for CVE-2026-47260 — systemic SSRF in podcast & radio fetch paths CVSS 3.1HIGH 7.1
  • TI-2026-39340 Server-side request forgery in koel CVSS 4.0MEDIUM 5.3
  • TI-2026-37274 Koel: Server-Side Request Forgery (SSRF) in radio station creation due to missing validation bail CVSS 3.1MEDIUM 6.3
  • TI-2021-12956 Koel before 5.1.4 lacks login throttling, lacks a password strength policy, and shows… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences