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CVE-2026-18505

MEDIUM 5.4

Published 2026-09-23 · Last modified 2026-09-23

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.1%chance of exploitation in 30 days · 3rd percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

5.4CVSS 3.1 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ⚠User interaction: A user must take an action (click / open a file)
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept & exploit code

Test against your own equipment

curl -s https://vulnpedia.com/cve/CVE-2026-18505/poc.jsonMachine-readable PoC index for this CVE (for automation).

Listed for defensive triage, patch verification, and authorized testing on systems you own. Machine-readable: /cve/CVE-2026-18505/poc.json

Affected

Vendors Ibm Redhat

Products Financial Transaction Manager (Ftm) For Redhat Openshift Financial Transaction Manager Openshift

Weakness (CWE)

  • CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Known Affected Software Configurations

VendorProductVersion range
IbmFinancial Transaction Manager≥ 4.0.7.0 and < 4.0.11.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0
IbmFinancial Transaction Manager4.0.6.0

All CVSS metrics

  • MEDIUM 5.4 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  • MEDIUM 5.4 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

Patches & mitigations

Sources: NVD · CVE.org · EPSS