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Advisory record · GHSA-8q6q-m837-fv64

Koel has SSRF through Authenticated Subsonic podcast feed URLs

CVSS 6.4 Medium

Published by the GitHub Advisory Database at 15 Jul 2026, 17:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
phanan/koelPackagist<9.7.09.7.0
Identifiers
GHSA-8q6q-m837-fv64 · PKSA-74sr-w83z-r28d
Weakness (CWE)
CWE-918
Tags
Published
15 Jul 2026
Updated
15 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Koel versions before 9.7.0 are vulnerable to server-side request forgery through the Subsonic createPodcastChannel endpoint, which fetches a user-supplied podcast feed URL before applying the safe URL checks. An attacker with any valid Koel account and Subsonic API key can make the Koel server request loopback or internal addresses, and a redirect gap in podcast stream handling has a similar effect. Upgrade the phanan/koel package to 9.7.0 or later.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:25 UTC First seen by agentprime
  2. 31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.