CVE-2026-14974 IBM WebSphere Application Server is affected by cross-site scripting and deserialization vulnerabilities

What is CVE-2026-14974?

CVE-2026-14974 is a high-severity unsafe deserialization 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 8.5, and 9.0 traditional could allow a remote attacker to execute arbitrary code caused by unsafe deserialization of untrusted data.

Weakness: CWE-502

Which versions are affected by CVE-2026-14974?

It affects 1 product.

Products include Ibm Websphere Application Server.

How do I fix CVE-2026-14974?

No fix has been published for CVE-2026-14974 yet. Limit exposure of the affected software until one is available.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2026-14974 being exploited?

There is no known exploitation of CVE-2026-14974 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-3943-mgp9-h6fv.