CVE-2026-18505

IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to open redirect in the PMP `HostHeaderFilter` (`HostHeaderFilter.java:151`). An unauthenticated attacker can craft a request with a manipulated `Host` header to redirect authenticated operators to attacker-controlled sites, enabling credential phishing.

  • Published Sep 23, 2026
  • CVSS 5.4 medium
  • 0.1% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-18505 at the National Vulnerability Database