CVE-2026-18499: IBM WebSphere Application Server Liberty is affected by a privilege escalation
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.
Other sources
IBM WebSphere Application Server Liberty is vulnerable to a privilege escalation when using Liberty collectives.
— IBM
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
IBM WebSphere Application Server Libertyto a version that resolves this vulnerability.Fixed in 26.0.0.9Patch APAR DT497580 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch DT497580
Event History
Frequently Asked Questions
What is the severity of CVE-2026-18499?
The severity of CVE-2026-18499 is classified as high with a score of 8.1.
What type of vulnerability is described in CVE-2026-18499?
CVE-2026-18499 describes a privilege escalation vulnerability in IBM WebSphere Application Server Liberty.
Which versions of IBM WebSphere Application Server Liberty are affected by CVE-2026-18499?
CVE-2026-18499 affects IBM WebSphere Application Server Liberty versions 17.0.0.3 through 26.0.0.8.
How do I fix CVE-2026-18499?
To fix CVE-2026-18499, upgrade to a patched version of IBM WebSphere Application Server Liberty as recommended by IBM.
What could happen if CVE-2026-18499 is exploited?
Exploitation of CVE-2026-18499 could allow an attacker to escalate privileges within the affected IBM WebSphere Application Server Liberty environment.