CVE-2026-54491Network attack vector

Authenticated SSRF via redirect and DNS rebinding

Published Aug 19, 2026 · Updated Aug 20, 2026

Server-side request forgery in Koel before 9.7.1 allows remote authenticated users to reach internal services via podcast and radio URLs. App\Helpers\Network::isPublicHost() and isSafeUrl() validate the initial host without pinning the resolved address, and most podcast and radio fetch paths follow redirect hops without revalidating each target. Any authenticated account can trigger podcast or internet-radio endpoints to probe internal hosts or cloud metadata from the server's network position, and some paths can reflect fetched response content.

CVSS severity7.1
High
EPSS probability0.29%
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 9.7.1 allows remote authenticated users to reach internal services via podcast and radio URLs. App\Helpers\Network::isPublicHost() and isSafeUrl() validate the initial host without pinning the resolved address, and most podcast and radio fetch paths follow redirect hops without revalidating each target. Any authenticated account can trigger podcast or internet-radio endpoints to probe internal hosts or cloud metadata from the server's network position, and some paths can reflect fetched response content.

The record

CVE
CVE-2026-54491
Published
Aug 19, 2026
Updated
Aug 20, 2026
Vendor
Koel
Product
Koel
Classifications
CWE-918
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=< 9.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Koel · Koelversion=< 9.7.1

Published CVSS scores

7.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

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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