CVE-2026-18490: IBM Financial Transaction Manager (FTM) for RedHat OpenShift is vulnerable to unauthenticated remote code exec

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-18490 is a high-severity flaw (CVSS 8.8) affecting financial transaction manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-502
Published	2026-09-23
Last modified	2026-10-07

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-23 16:16 UTCPublished CVE record published
2026-10-07 13:03 UTCUpdated Record last modified

ibm financial transaction manager UPGRADE

Affected: >= 4.0.7.0 and < 4.0.11.0 · 4.0.6.0 · 4.0.6.0 interim_fix_1 · 4.0.6.0 interim_fix_2 · 4.0.6.0 interim_fix_3 · 4.0.6.0 interim_fix_4 · 4.0.6.0 interim_fix_5 · 4.0.6.0 interim_fix_6

Fixed in: 4.0.11.0

Safe to downgrade to: a release before 4.0.6.0

1. Check installed version

apt-cache policy financial-transaction-manager || rpm -q financial-transaction-manager || financial-transaction-manager --version

2. UPGRADE to 4.0.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade financial-transaction-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade financial-transaction-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 4.0.6.0 (Debian / Ubuntu)

apt-cache madison financial-transaction-manager sudo apt install financial-transaction-manager=<VERSION_BEFORE_4.0.6.0> sudo apt-mark hold financial-transaction-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list financial-transaction-manager sudo dnf downgrade financial-transaction-manager-<VERSION_BEFORE_4.0.6.0> sudo dnf versionlock add financial-transaction-manager

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-18490?

financial transaction manager: upgrade to 4.0.11.0. Exact commands for each OS are on this page.

Is CVE-2026-18490 being exploited?

CVE-2026-18490 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-18490 affect?

CVE-2026-18490 affects financial transaction manager. Severity is high (CVSS 8.8). 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,

How urgent is CVE-2026-18490?

Priority 50/100. High severity; On your watchlist

Software pages

Java vulnerabilities · Red Hat OpenShift vulnerabilities

Related CVEs

CVE-2026-17620 MEDIUM 5.3 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift 4.0.6.0 through 4.0.6.0.0.6.0 Refresh (Operator 4
CVE-2026-17618 HIGH 7.3 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote unauthenticated attacker to
CVE-2026-18156 MEDIUM 6.5 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote authenticated attacker to by
CVE-2026-18154 HIGH 8.0 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to obtain sensitive
CVE-2026-18153 MEDIUM 5.4 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote authenticated attacker to ob

References

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