What is CVE-2026-18531?

CVE-2026-18531 is a medium-severity vulnerability in IBM Maximo Application Suite, classified under Use of Insufficiently Random Values. CVSS score: 5.3/10. Published 2026-08-05.

How severe is CVE-2026-18531?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in IBM Maximo Application Suite

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 to the use of a weak HMAC session signing secret.

Published 2026-08-05 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (31.8th percentile), scored 2026-11-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Maximo Application Suite — versions 9.2, 9.1, 9.0
IBM Maximo Application Suite — versions 9.2

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

www.ibm.com/support/pages/node/7282362 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-18531?: CVE-2026-18531 is a medium-severity vulnerability in IBM Maximo Application Suite, classified under Use of Insufficiently Random Values. CVSS score: 5.3/10. Published 2026-08-05.
How severe is CVE-2026-18531?: Medium severity. CVSS v3 base score is 5.3 out of 10.