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 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.

Affected

linuxserver · Heimdall

CVSS v3.1 MITRE

3.4 LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS

0.16% chance of exploitation in the next 30 days, 5th percentile

Published

2026-10-08

Proof-of-concept exploits (1)

• kashishtopi/heimdall-unauth-ssrf0★ · 2026-10-05

References

• CVE Record
• NVD entry

Related

• CVE-2026-105314
• CVE-2026-107450
• CVE-2026-108980