SB2026060328 - Deserialization of untrusted data in IBM WebSphere Application Server

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Main Vulnerability Database SB2026060328

SB2026060328 - Deserialization of untrusted data in IBM WebSphere Application Server

Published: June 3, 2026

Security Bulletin ID SB2026060328
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Deserialization of Untrusted Data (CVE-ID: CVE-2026-9330)

CWE-ID: CWE-502 - Deserialization of Untrusted Data

CVSSv4: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:U/U:Clear


The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper validation of user-supplied data during deserialization using the SAML Web Single Sign-On component. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install update from vendor's website.

References