CVE-2026-18531: IBM Maximo Application Suite 9.2, 9.1, and 9.0 could allow a remote attacker to tamper with session data due t

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-18531 is a medium-severity flaw (CVSS 5.3) affecting maximo application suite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Maximo Application Suite 9.2, 9.1, and 9.0 could allow a remote attacker to tamper with session data due to the use of a weak HMAC session signing secret.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-330
Published	2026-08-05
Last modified	2026-10-23

Publisher (CNA): IBM Corporation · Vendor: ibm

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-05 16:16 UTCPublished CVE record published
2026-10-23 21:10 UTCUpdated Record last modified

ibm maximo application suite UPGRADE

Affected: >= 9.0 and < 9.0.28 · >= 9.1 and < 9.1.20 · 9.2

Fixed in: 9.0.28, 9.1.20

Safe to downgrade to: a release before 9.0

1. Check installed version

apt-cache policy maximo-application-suite || rpm -q maximo-application-suite || maximo-application-suite --version

2. UPGRADE to 9.0.28 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade maximo-application-suite

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade maximo-application-suite

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 9.0 (Debian / Ubuntu)

apt-cache madison maximo-application-suite sudo apt install maximo-application-suite=<VERSION_BEFORE_9.0> sudo apt-mark hold maximo-application-suite

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

dnf --showduplicates list maximo-application-suite sudo dnf downgrade maximo-application-suite-<VERSION_BEFORE_9.0> sudo dnf versionlock add maximo-application-suite

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-2026-18531?

maximo application suite: upgrade to 9.0.28, 9.1.20. Exact commands for each OS are on this page.

Is CVE-2026-18531 being exploited?

CVE-2026-18531 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-2026-18531 affect?

CVE-2026-18531 affects maximo application suite. Severity is medium (CVSS 5.3). IBM Maximo Application Suite 9.2, 9.1, and 9.0 could allow a remote attacker to tamper with session data due to the use of a weak HMAC session signing secret.

How urgent is CVE-2026-18531?

Priority 31/100. Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-15656 MEDIUM 4.3 UPGRADE IBM Maximo Application Suite 9.2, 9.1, and 9.0 does not set the secure attribute on authorization tokens or se

References

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