PatchSiren cyber security CVE debrief

CVE-2026-18531 IBM CVE debrief

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. This vulnerability affects session data integrity and confidentiality. Security teams should review official advisories for scope and severity. Evidence is limited; primary records indicate a weak HMAC session signing secret in these versions. Defenders should verify affected deployments exist and review compensating controls.

Vendor: IBM
Product: Maximo Application Suite
CVSS: MEDIUM 5.3
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-08-05
Original CVE updated: 2026-08-05
Advisory published: 2026-08-05
Advisory updated: 2026-08-05

Who should care

Security teams responsible for IBM Maximo Application Suite installations should review and remediate this vulnerability. Teams should also verify affected product deployments exist in managed environments and review official advisories for scope, severity, and vendor guidance. Additionally, security teams should monitor for suspicious session activity and review compensating controls for exposed systems.

Technical summary

IBM Maximo Application Suite 9.2, 9.1, and 9.0 use a weak HMAC session signing secret, potentially allowing remote attackers to tamper with session data. This could lead to session tampering, which could have a medium impact on confidentiality and integrity.

Defensive priority

Medium-priority defensive review recommended due to potential session tampering risk.

Recommended defensive actions

Review and strengthen HMAC session signing secrets
Verify and update IBM Maximo Application Suite to the latest version
Monitor for suspicious session activity
Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
Review compensating controls for exposed systems while remediation is scheduled and verified.

Evidence notes

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. Evidence is limited; primary official records indicate a weak HMAC session signing secret in IBM Maximo Application Suite versions 9.2, 9.1, and 9.0. Defenders should verify affected product deployments exist in managed environments and review official advisories for scope, severity, and vendor guidance.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-05T16:16:54.290Z and has not been modified since then.