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Vulnerability record · CVE-2026-9330 · published 1 June 2026

CVE-2026-9330: Ibm websphere application server deserialization of untrusted data vulnerability

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.

8.5 CVSS 3.1 High EPSS 0.68% · top 49.8% CWE-502 · Deserialization of untrusted data
8.5CVSS 3.1 base score
0.68%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
22 Jul 2026Last modified by NVD

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:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.ibm.com/support/pages/node/7274733 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2015-7450IBM products Java deserialization RCE via Commons CollectionsMultiple IBM analytics, business, IT infrastructure, and mobile/social products expose serialized-object interfaces that deserialize untrusted Java o…KEVEPSS 98%analysed10.0CVE-2015-1920Ibm websphere application server improper access control vulnerabilityIBM WebSphere Application Server (WAS) 6.1 through 6.1.0.47, 7.0 before 7.0.0.39, 8.0 before 8.0.0.11, and 8.5 before 8.5.5.6 allows remote attackers…EPSS 6.8%10.0CVE-2013-1777Apache geronimo code injection vulnerabilityThe JMX Remoting functionality in Apache Geronimo 3.x before 3.0.1, as used in IBM WebSphere Application Server (WAS) Community Edition 3.0.0.3 and o…EPSS 9.8%10.0CVE-2013-0462Ibm websphere application server vulnerabilityUnspecified vulnerability in IBM WebSphere Application Server (WAS) 6.1, 7.0 before 7.0.0.27, 8.0, and 8.5 has unknown impact and attack vectors.EPSS 1.8%10.0CVE-2012-5955Ibm http server vulnerabilityUnspecified vulnerability in the IBM HTTP Server component 5.3 in IBM WebSphere Application Server (WAS) for z/OS allows remote attackers to execute …EPSS 4.4%10.0CVE-2011-1377Ibm websphere application server vulnerabilityThe Web Services Security component in the Web Services Feature Pack before 6.1.0.41 for IBM WebSphere Application Server (WAS) 6.1 does not properly…EPSS 2.3%10.0CVE-2010-3186Ibm websphere application server improper input validation vulnerabilityIBM WebSphere Application Server (WAS) 7.x before 7.0.0.13, and WebSphere Application Server Feature Pack for Web Services 6.1.0.9 through 6.1.0.32, …EPSS 2.6%10.0CVE-2010-0425Apache mod_isapi on Windows remote code execution via orphaned callbacksmod_isapi in Apache HTTP Server on Windows does not ensure request processing is complete before calling isapi_unload for an ISAPI .dll module, leavi…EPSS 94%analysed

Source: NIST National Vulnerability Database (record CVE-2026-9330), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.