---
id: CVE-2026-18490
title: >-
  IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to
  unauthenticated remote code execution via Java native deserialization on the
  PayDir Business Rules Manager RMI SSL endpoint
  (BrmRMISSLServerSocketFactory.java:…
summary: >-
  IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to
  unauthenticated remote code execution via Java native deserialization on the
  PayDir Business Rules Manager RMI SSL endpoint
  (BrmRMISSLServerSocketFactory.java:…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: IBM
product: "Financial Transaction Manager (FTM)\_for RedHat OpenShift"
affected:
  - >-
    financial_transaction_manager_ftm_for_redhat_openshift >= 4.0.6.0 <=
    4.0.10.0
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:10.633'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-18490'
references:
  - url: 'https://www.ibm.com/support/pages/node/7288641'
    label: psirt@us.ibm.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-23T18:13:02.634803Z'
ingestedAt: '2026-09-23T16:27:22.651Z'
---

## Overview

IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to unauthenticated remote code execution via Java native deserialization on the PayDir Business Rules Manager RMI SSL endpoint (BrmRMISSLServerSocketFactory.java:95, EP8). An adjacent-network attacker can deliver a crafted serialized payload to achieve arbitrary code execution, exposing all PayDir credentials and enabling manipulation of payment business rules.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.