CVE-2026-18249: IBM i Is Affected By Multiple Vulnerabilities in IBM Java SDK and IBM Java Runtime

Published Aug 12, 2026
·
Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to gain elevated privileges due to improper validation of pointers read from Java-controlled addresses.

Other sources

IBM i could allow a remote authenticated attacker to gain elevated privileges due to improper validation of pointers read from Java-controlled addresses.

— IBM

Affected Software

9 affected components
IBM IBM i>=7.3<=7.6
IBM i<=7.6
IBM i<=7.5
IBM i<=7.4
IBM i<=7.3
IBM i=7.3
IBM i=7.4
IBM i=7.5
IBM i=7.6

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11037
  2. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11013
  3. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11014
  4. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11041
  5. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11042
  6. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11063
  7. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11064
  8. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11065
  9. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11066
  10. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11078
  11. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11079
  12. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11080
  13. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11081
  14. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ10990
  15. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11016
  16. Upgrade

    Upgrade IBM i Release5770-JV1 to a version that resolves this vulnerability.

    Patch SJ11040
  17. Operational

    IBM strongly recommends addressing the vulnerability now by applying the listed PTFs for IBM i 7.6, 7.5, 7.4, and 7.3 (5770-JV1).

Event History

Aug 12, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Aug 13, 2026
CVE Published
via MITRE·08:43 PM
Data Sourced
via MITRE·08:43 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2026-18249?

CVE-2026-18249 has a high severity rating of 8.4.

2

What systems are affected by CVE-2026-18249?

CVE-2026-18249 affects IBM i versions 7.6, 7.5, 7.4, and 7.3.

3

How do I fix CVE-2026-18249?

To fix CVE-2026-18249, apply the latest patches and updates provided by IBM for the affected IBM i versions.

4

What types of attacks are possible with CVE-2026-18249?

CVE-2026-18249 could allow a remote authenticated attacker to gain elevated privileges.

5

What causes the vulnerability CVE-2026-18249?

CVE-2026-18249 is caused by improper validation of pointers read from Java-controlled addresses.

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