linuxserver Heimdall through 2.8.3 applies its SafeUrlFetcher SSRF protection mechanism only to ItemController; the enhanced-application test and live-stats requests occur via SupportedApps::execute(), a GuzzleHttp client that lacks IP address restrictions. In some realistic installations, the POST /test_config (and GET /get_stats) endpoints are accessible through CSRF, and thus an unauthenticated attacker can force the server to send requests to arbitrary internal hosts and ports (including 169.254.169.254) and read a status/port oracle in addition to partial response data.

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History

Thu, 08 Oct 2026 07:15:00 +0000

Type Values Removed Values Added
Title Heimdall SSRF via /test_config Endpoint

Thu, 08 Oct 2026 06:45:00 +0000

Type Values Removed Values Added
First Time appeared Linuxserver
Linuxserver heimdall
Vendors & Products Linuxserver
Linuxserver heimdall

Thu, 08 Oct 2026 05:00:00 +0000

Type Values Removed Values Added
Description linuxserver Heimdall through 2.8.3 applies its SafeUrlFetcher SSRF protection mechanism only to ItemController; the enhanced-application test and live-stats requests occur via SupportedApps::execute(), a GuzzleHttp client that lacks IP address restrictions. In some realistic installations, the POST /test_config (and GET /get_stats) endpoints are accessible through CSRF, and thus an unauthenticated attacker can force the server to send requests to arbitrary internal hosts and ports (including 169.254.169.254) and read a status/port oracle in addition to partial response data.
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-10-08T04:28:17.619Z

Reserved: 2026-10-08T04:28:16.780Z

Link: CVE-2026-107449

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T05:17:04.297

Modified: 2026-10-08T05:17:04.297

Link: CVE-2026-107449

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T07:00:10Z

Weaknesses