CVE-2026-18099: IBM i is Affected By Multiple Vulnerabilities in Navigator for i

Published Aug 11, 2026
·
Updated

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to execute arbitrary script code due to improper neutralization of user-controlled input.

Other sources

IBM i could allow a remote authenticated attacker to execute arbitrary script code due to improper neutralization of user-controlled input.

— IBM

Affected Software

4 affected components
IBM i<=7.6
IBM i<=7.5
IBM i<=7.4
IBM i<=7.3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM i to a version that resolves this vulnerability.

    Fixed in 7.6Patch SJ10887
  2. Upgrade

    Upgrade IBM i to a version that resolves this vulnerability.

    Fixed in 7.5Patch SJ10888
  3. Upgrade

    Upgrade IBM i to a version that resolves this vulnerability.

    Fixed in 7.4Patch SJ10890
  4. Upgrade

    Upgrade IBM i to a version that resolves this vulnerability.

    Fixed in 7.3Patch SJ10891

Event History

Aug 11, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
Aug 12, 2026
CVE Published
via MITRE·07:41 PM
Data Sourced
via MITRE·07:41 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:17 PM
DescriptionSeverityWeakness

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-18099?

The severity of CVE-2026-18099 is high with a score of 8.9.

2

How do I fix CVE-2026-18099?

To fix CVE-2026-18099, ensure that you apply the latest patches provided by IBM for your version of IBM i.

3

What versions of IBM i are affected by CVE-2026-18099?

CVE-2026-18099 affects IBM i versions 7.6, 7.5, 7.4, and 7.3.

4

What type of vulnerability is CVE-2026-18099?

CVE-2026-18099 is classified as a cross-site scripting (XSS) vulnerability.

5

Who can exploit CVE-2026-18099?

CVE-2026-18099 can be exploited by a remote authenticated attacker.

Company

Resources

Contact

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