CVE-2026-15064 IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

What is CVE-2026-15064?

CVE-2026-15064 is a high-severity vulnerability in Ibm Websphere Application Server, published on 28 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 and IBM WebSphere Application Server - Liberty is vulnerable to HTTP Response Smuggling due to improper handling of non-standard HTTP version tokens.

Weakness: CWE-444

Which versions are affected by CVE-2026-15064?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2026-15064?

No fix has been published for CVE-2026-15064 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-15064 being exploited?

There is no known exploitation of CVE-2026-15064 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-cgw7-p7f6-2pjh.