Open Redirect in Linuxserver Docker-heimdall

CVE-2025-50578

LinuxServer.io heimdall 2.6.3-ls307 contains a vulnerability in how it handles user-supplied HTTP headers, specifically `X-Forwarded-Host` and `Referer`. An unauthenticated remote attacker can manipulate these headers to perform Host Heade…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.028 (84.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-50578?
CVE-2025-50578 is a critical-severity vulnerability in Linuxserver Docker-heimdall, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2025-07-30.
How severe is CVE-2025-50578?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-50578 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.