Low severity · published Oct 8, 2026
CVE-2026-107449
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…
3.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Heimdall · linuxserver
through 2.8.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-107449
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-107449
exploit
https://github.com/kashishtopi/heimdall-unauth-ssrf
product
https://github.com/linuxserver/Heimdall/blob/9ad5864a80d7025db1e6eab8eb2981c165b0ddff/app/SupportedApps.php
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