CVE-2026-54494Public exploitNetwork attack vector

Authenticated full-read SSRF via IPv6 transition wrappers

Published Aug 19, 2026 · Updated Aug 25, 2026

SSRF in Koel before 9.7.1 allows remote authenticated users to read internal HTTP responses via crafted podcast enclosure URLs. The isPublicHost() guard treats NAT64 and 6to4 wrappers of private IPv4 addresses as public, then EpisodePlayable fetches and returns the enclosure body. Exploitation requires a valid Koel account, a controlled podcast feed, and NAT64 or 6to4 routing on the server; exposed data is limited to reachable HTTP responses.

CVSS severity5.3
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Koel before 9.7.1 allows remote authenticated users to read internal HTTP responses via crafted podcast enclosure URLs. The isPublicHost() guard treats NAT64 and 6to4 wrappers of private IPv4 addresses as public, then EpisodePlayable fetches and returns the enclosure body. Exploitation requires a valid Koel account, a controlled podcast feed, and NAT64 or 6to4 routing on the server; exposed data is limited to reachable HTTP responses.

The record

CVE
CVE-2026-54494
Published
Aug 19, 2026
Updated
Aug 25, 2026
Vendor
Koel
Product
Koel
Classifications
CWE-918, CAPEC-664, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 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

5.3GitHub CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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)
CAPEC-664Server Side Request Forgery
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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