Bug 2547776 (CVE-2026-107449)

Summary: CVE-2026-107449 heimdall: heimdall: Information disclosure via server-side request forgery
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Heimdall. This vulnerability allows an unauthenticated remote attacker to cause information disclosure via server-side request forgery (SSRF). The application fails to enforce IP address restrictions when sending outbound requests for enhanced application testing and live statistics. By leveraging cross-site request forgery (CSRF), an attacker can force the server to send requests to arbitrary internal network hosts and expose sensitive services or internal network status.
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Bug Depends On: 2547793    
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Description OSIDB Bzimport 2026-10-08 04:51:24 UTC 
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.