CVE-2026-9319: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server
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.
AI Analysis
Technical Summary
CVE-2026-9319 is a deserialization vulnerability (CWE-502) in IBM WebSphere Application Server versions 8.5 and 9.0. It arises from insecure handling of untrusted data deserialized through JAX-WS endpoints protected by WS-Security, potentially enabling remote code execution. The vulnerability is network exploitable without authentication and has a critical CVSS score of 9.0. As of the published date, no official remediation or patch has been disclosed by IBM.
Potential Impact
Successful exploitation could lead to remote code execution, compromising confidentiality, integrity, and availability of the affected WebSphere Application Server instances. This could allow attackers to execute arbitrary code remotely without authentication, posing a critical security risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until an official fix is available, consider restricting network access to JAX-WS endpoints and applying any recommended temporary mitigations from IBM. Monitor IBM's security advisories closely for updates.
CVE-2026-9319: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server
Description
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.
CVSS v3.1
Score 9.0critical
Affected software
pkg:maven/com.ibm.websphere/websphere-application-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9319 is a deserialization vulnerability (CWE-502) in IBM WebSphere Application Server versions 8.5 and 9.0. It arises from insecure handling of untrusted data deserialized through JAX-WS endpoints protected by WS-Security, potentially enabling remote code execution. The vulnerability is network exploitable without authentication and has a critical CVSS score of 9.0. As of the published date, no official remediation or patch has been disclosed by IBM.
Potential Impact
Successful exploitation could lead to remote code execution, compromising confidentiality, integrity, and availability of the affected WebSphere Application Server instances. This could allow attackers to execute arbitrary code remotely without authentication, posing a critical security risk to affected systems.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until an official fix is available, consider restricting network access to JAX-WS endpoints and applying any recommended temporary mitigations from IBM. Monitor IBM's security advisories closely for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-22T20:33:29.999Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1de30be29bf47b503a5786
Added to database: 06/01/2026, 19:52:43 UTC
Last enriched: 06/08/2026, 20:54:18 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 107
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