CVE-2026-5516 IBM WebSphere Application Server Liberty is affected by a security bypass vulnerability

What is CVE-2026-5516?

CVE-2026-5516 is a medium-severity vulnerability in Ibm Websphere Application Server, published on 27 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

IBM WebSphere Application Server - Liberty 22.0.0.11 through 26.0.0.5 IBM WebSphere Application Server Liberty could allow a remote attacker to bypass security under limited conditions by exploiting a specific timing window.

Weakness: CWE-362

Which versions are affected by CVE-2026-5516?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2026-5516?

No fix has been published for CVE-2026-5516 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-5516 being exploited?

There is no known exploitation of CVE-2026-5516 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-gccj-9cv3-fp5p.