PatchSiren

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
2026-08-06
Advisory published
2026-08-05
Advisory updated
2026-08-06

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-18531 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-18531

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-18531 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-18531

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.