All vulnerabilities
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()

linuxserver Heimdall
Open in ThreatlineRecord JSON
CVSS
3.4Low
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 8 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.16%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version yet
Published8 Oct 2026Updated 8 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version.

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.

Text from CVE List

Affected versions 1

  • Heimdallaffected: all versions through 2.8.3CVE List

References 2