CVE-2026-9330: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server
IBM WebSphere Application Server 9.0, and 8.5 is affected by an improper validation of user-supplied data during deserialization using the SAML Web Single Sign-On component. This could result in remote code execution via a crafted HTTP request when combined with a suitable gadget chain.
AI Analysis
Technical Summary
CVE-2026-9330 is a deserialization vulnerability (CWE-502) in IBM WebSphere Application Server versions 8.5 and 9.0 affecting the SAML Web Single Sign-On component. The vulnerability arises from improper validation of user-supplied data during deserialization, which can be exploited via a crafted HTTP request combined with a suitable gadget chain to achieve remote code execution. The CVSS 3.1 base score is 8.5, reflecting high impact and requiring low privileges but high attack complexity.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary code remotely on affected IBM WebSphere Application Server instances, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the SAML Web Single Sign-On component and monitoring for suspicious HTTP requests targeting this functionality.
CVE-2026-9330: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server
Description
IBM WebSphere Application Server 9.0, and 8.5 is affected by an improper validation of user-supplied data during deserialization using the SAML Web Single Sign-On component. This could result in remote code execution via a crafted HTTP request when combined with a suitable gadget chain.
CVSS v3.1
Score 8.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-9330 is a deserialization vulnerability (CWE-502) in IBM WebSphere Application Server versions 8.5 and 9.0 affecting the SAML Web Single Sign-On component. The vulnerability arises from improper validation of user-supplied data during deserialization, which can be exploited via a crafted HTTP request combined with a suitable gadget chain to achieve remote code execution. The CVSS 3.1 base score is 8.5, reflecting high impact and requiring low privileges but high attack complexity.
Potential Impact
Successful exploitation could allow an attacker to execute arbitrary code remotely on affected IBM WebSphere Application Server instances, potentially leading to full system compromise including confidentiality, integrity, and availability impacts. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until an official fix is released, consider restricting access to the SAML Web Single Sign-On component and monitoring for suspicious HTTP requests targeting this functionality.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-22T22:15:58.580Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a1de30be29bf47b503a5789
Added to database: 6/1/2026, 7:52:43 PM
Last enriched: 6/1/2026, 8:03:37 PM
Last updated: 6/2/2026, 5:04:04 AM
Views: 7
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