CVE-2026-18499 IBM WebSphere Application Server Liberty is affected by a privilege escalation

What is CVE-2026-18499?

CVE-2026-18499 is a high-severity vulnerability in Ibm Websphere Application Server, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.

Weakness: CWE-285

Which versions are affected by CVE-2026-18499?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2026-18499?

No fix has been published for CVE-2026-18499 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-18499 being exploited?

There is no known exploitation of CVE-2026-18499 in the wild and no public exploit code.

Other vulnerabilities in Ibm Websphere Application Server

• CVE-2015-1920 Code injection in n/a Critical 10.0
• CVE-2013-0462 Other in n/a Critical 10.0
• CVE-2011-1377 Security feature bypass in n/a Critical 10.0
• CVE-2010-3186 Other in n/a Critical 10.0
• CVE-2009-1899 Information disclosure in n/a Critical 10.0

All Ibm Websphere Application Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-fg2c-rf98-x93f.