IBM WAS 8.5-9.0 RCE via Deserialization in JAX-WS WS-Security
CVE-2026-9319 Published on June 1, 2026
IBM WebSphere Application Server is affected by a remote code execution vulnerability
IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to potential remote code execution due to deserialization of untrusted data via JAX-WS endpoints with WS-Security.
Vulnerability Analysis
CVE-2026-9319 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-9319 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-9319
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Affected Versions
IBM WebSphere Application Server:- Version 9.0, <= 1.1.9.12 is affected.
- Version 8.5 is affected.