SB2026060331 - Multiple vulnerabilities in IBM WebSphere Remote Server

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Main Vulnerability Database SB2026060331

SB2026060331 - Multiple vulnerabilities in IBM WebSphere Remote Server

Published: June 3, 2026

Security Bulletin ID SB2026060331
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Code Injection (CVE-ID: CVE-2026-9311)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

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


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

The vulnerability exists due to bypass of security controls. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

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


2) 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