CVE-2026-11897 IBM WebSphere Application Server Liberty is affected by a denial of service vulnerability with HTTP/2

What is CVE-2026-11897?

CVE-2026-11897 is a high-severity denial of service vulnerability in Ibm Websphere Application Server, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to a denial of service, caused by sending a specially crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.

Weakness: CWE-770

Which versions are affected by CVE-2026-11897?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2026-11897?

No fix has been published for CVE-2026-11897 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-11897 being exploited?

There is no known exploitation of CVE-2026-11897 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-89rj-ccwc-wmpm.