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CVE-2026-9311— IBM WebSphere Application Server is affected by remote code execution

Quick assessment

Affected
IBM WebSphere Application Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

IBM WebSphere Application Server（WAS）是美国国际商业机器（IBM）公司的一款应用服务器产品。该产品是JavaEE和Web服务应用程序的平台，也是IBMWebSphere软件平台的基础。 IBM WebSphere Application Server 9.0版本和8.5版本存在代码注入漏洞，该漏洞源于绕过安全控制，可能导致远程代码执行。

CVSS 9.0 · Critical EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
IBM WebSphere Application Server 9.0≤ 1.1.9.12 affected
8.5 affected
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I. Basic Information for CVE-2026-9311

Vulnerability Information
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Vulnerability Title
IBM WebSphere Application Server is affected by remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to remote code execution caused by the bypass of security controls.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
IBM WebSphere Application Server（WAS） 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
IBM WebSphere Application Server（WAS）是美国国际商业机器（IBM）公司的一款应用服务器产品。该产品是JavaEE和Web服务应用程序的平台，也是IBMWebSphere软件平台的基础。 IBM WebSphere Application Server 9.0版本和8.5版本存在代码注入漏洞，该漏洞源于绕过安全控制，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM WebSphere Application Server 9.0 ~ 1.1.9.12 cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9311

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III. Intelligence Information for CVE-2026-9311

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Vendor Advisories for CVE-2026-9311 (1)

Same Patch Batch · IBM · 2026-06-01 · 5 CVEs total

CVE-2026-8644 9.1 CRITICAL IBM WebSphere Application Server is affected by an identity spoofing vulnerability
CVE-2026-9319 9.0 CRITICAL IBM WebSphere Application Server is affected by a remote code execution vulnerability
CVE-2026-7770 8.8 HIGH IBM i Access Client Solutions (ACS) is vulnerable to remote code execution when configured
CVE-2026-9330 8.5 HIGH IBM WebSphere Application Server is affected by remote code execution

IV. Related Vulnerabilities

Same product: WebSphere Application Server
Same vendor: IBM
Same weakness: CWE-94

V. Comments for CVE-2026-9311

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