CVE-2026-54493Public exploitNetwork attack vector

Authenticated full-read SSRF via unvalidated radio URLs

Published Aug 19, 2026 · Updated Aug 19, 2026

Server-side request forgery in Koel before 9.7.0 allows remote authenticated users to read internal HTTP responses via radio URLs. The Subsonic createInternetRadioStation.view and updateInternetRadioStation.view requests accept streamUrl without SafeUrl or HasAudioContentType, and RadioStreamProxy::openStream() later passes that stored URL to fopen() and relays the response body through /radio/stream/{id}. Any authenticated account that can create or update a radio station can use the Koel server as a full-read proxy to loopback, RFC1918, Docker bridge, metadata, or other reachable internal HTTP services.

CVSS severity7.7
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Koel before 9.7.0 allows remote authenticated users to read internal HTTP responses via radio URLs. The Subsonic createInternetRadioStation.view and updateInternetRadioStation.view requests accept streamUrl without SafeUrl or HasAudioContentType, and RadioStreamProxy::openStream() later passes that stored URL to fopen() and relays the response body through /radio/stream/{id}. Any authenticated account that can create or update a radio station can use the Koel server as a full-read proxy to loopback, RFC1918, Docker bridge, metadata, or other reachable internal HTTP services.

The record

CVE
CVE-2026-54493
Published
Aug 19, 2026
Updated
Aug 19, 2026
Vendor
Koel
Product
Koel
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.7.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Koel · Koelversion=< 9.7.0

Published CVSS scores

7.7GitHub_MCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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