IBM WebSphere Application Server up to 1.1.9.12/8.5 JAX-WS Endpoint deserialization

Summaryinfo

A vulnerability was found in IBM WebSphere Application Server up to 1.1.9.12/8.5. It has been declared as problematic. This affects an unknown function of the component JAX-WS Endpoint. The manipulation results in deserialization. This vulnerability is identified as CVE-2026-9319. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in IBM WebSphere Application Server up to 1.1.9.12/8.5. Affected is some unknown processing of the component JAX-WS Endpoint. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at ibm.com. This vulnerability is traded as CVE-2026-9319 since 05/22/2026. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318160 (IBM WebSphere Application Server 8.5.x < 8.5.5.30 / 9.x < 9.0.5.29 RCE (7274738)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318160) and CERT Bund (WID-SEC-2026-1762). Once again VulDB remains the best source for vulnerability data.

Affected

• IBM Tivoli Key Lifecycle Manager
• IBM Tivoli Network Manager
• IBM WebSphere Service Registry and Repository
• IBM Business Automation Workflow
• IBM WebSphere Application Server

Productinfo

Type

• Application Server Software

Vendor

• IBM

Name

• WebSphere Application Server

Version

• 1.1.9.0
• 1.1.9.1
• 1.1.9.2
• 1.1.9.3
• 1.1.9.4
• 1.1.9.5
• 1.1.9.6
• 1.1.9.7
• 1.1.9.8
• 1.1.9.9
• 1.1.9.10
• 1.1.9.11
• 1.1.9.12
• 8.0
• 8.1
• 8.2
• 8.3
• 8.4
• 8.5

License

• commercial

Website

• Vendor: https://www.ibm.com/

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Once again VulDB remains the best source for vulnerability data.

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