CVE-2026-57209: heimdall < 0.17.17

Affected technology

heimdall · < 0.17.17
dadrus

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can inject additional parameters into the Forwarded header, potentially spoofing IP addresses for upstream services. Vendor/CNA’s CVSS 4.0 assessment (base score 7.0/10) rates confidentiality, integrity and availability impact as none.