CVE-2024-51358Network attack vector

Unauthenticated server-side HTTP requests via application URL lookup

Published Nov 5, 2024 · Updated Nov 7, 2024

SSRF in LinuxServer.io Heimdall 2.6.1 allows remote attackers to make server-side HTTP requests through the Add Application feature. The feature accepts an application URL and retrieves it from the Heimdall host without restricting the request destination. The web GUI lacks authentication by default, so exposed instances permit unauthenticated network probing; optional password protection changes that gate.

CVSS severity9.8
Critical
EPSS probability0.95%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in LinuxServer.io Heimdall 2.6.1 allows remote attackers to make server-side HTTP requests through the Add Application feature. The feature accepts an application URL and retrieves it from the Heimdall host without restricting the request destination. The web GUI lacks authentication by default, so exposed instances permit unauthenticated network probing; optional password protection changes that gate.

The record

CVE
CVE-2024-51358
Published
Nov 5, 2024
Updated
Nov 7, 2024
Vendor
LinuxServer.io
Product
Heimdall
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 7, 2024Record 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=2.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LinuxServer.io · Heimdallversion=2.6.1

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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