CVE-2026-18156: IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote authenticated attacker to by

Routine

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2026-18156 is a medium-severity flaw (CVSS 6.5) 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 could allow a remote authenticated attacker to bypass security controls by forging user identities due to improper authorization.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-09-22
Last modified	2026-10-08

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-22 22:17 UTCPublished CVE record published
2026-10-08 15:09 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-2026-18156?

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

Is CVE-2026-18156 being exploited?

CVE-2026-18156 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-2026-18156 affect?

CVE-2026-18156 affects financial transaction manager. Severity is medium (CVSS 6.5). IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote authenticated attacker to bypass security controls by forging user identities due to improper authorization.

How urgent is CVE-2026-18156?

Priority 36/100. On your watchlist

Software pages

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-2026-18154 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
CVE-2026-18152 HIGH 7.4 UPGRADE IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to forge validly-si

References

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