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CVE-2026-11728— IBM MQ .NET client is vulnerable to remote code execution

Quick assessment

Affected
IBM MQ
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 MQ 9.1.0.0 至 9.1.0.37 LTS、9.2.0.0 至 9.2.0.43 LTS、9.3.0.0 至 9.3.0.41 LTS、9.3.0.0 至 9.3.5.1 CD、9.4.0.0 至 9.4.0.25 LTS、9.4.0.0 至 9.4.5.1 CD 以及 10.0.0.0 可能存在堆缓冲区溢出漏洞。当客户端从恶意队列管理器接收消息，或通过中间人攻击（Man-in-the-Middle）接收消息时，远程攻击者可能借此引发服务拒绝（DoS）故障，并有可能在客户端中执行任意代码。

CVSS 8.1 · High

Possible ATT&CK Techniques 1 AI

T1210 · Exploitation of Remote Services

Affected Version Matrix 7

VendorProduct Version RangeStatus
IBM MQ 9.1.0.0≤ 9.1.0.37 LTS affected
9.2.0.0≤ 9.2.0.43 LTS affected
9.3.0.0≤ 9.3.0.41 LTS affected
9.3.0.0≤ 9.3.5.1 CD affected
9.4.0.0≤ 9.4.0.25 LTS affected
9.4.0.0≤ 9.4.5.1 CD affected
10.0.0.0 affected
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I. Basic Information for CVE-2026-11728

Vulnerability Information
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Vulnerability Title
IBM MQ .NET client is vulnerable to remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow a remote attacker to cause a denial of service or potentially execute arbitrary code in the client due to a heap buffer overflow when receiving messages from a malicious queue manager or through a man-in-the-middle attack.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM MQ 9.1.0.0 ~ 9.1.0.37 LTS cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-11728

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III. Intelligence Information for CVE-2026-11728

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Other References for CVE-2026-11728 (1)

Same Patch Batch · IBM · 2026-09-15 · 25 CVEs total

CVE-2026-53710 10.0 CRITICAL MCP Context Forge: RestrictedPython sandbox bypass via getattr builtin in python_sandbox_s
CVE-2026-12351 9.8 CRITICAL IBM MQ is vulnerable to unauthenticated remote code execution via JNDI injection
CVE-2026-12728 8.8 HIGH IBM MQ Java messaging is vulnerable to remote code execution
CVE-2026-11729 8.5 HIGH IBM MQ Java messaging is vulnerable to remote code execution
CVE-2026-12666 8.1 HIGH IBM MQ Java messaging is vulnerable to XML external entity injection
CVE-2026-12355 8.1 HIGH IBM MQ Resource Adapter IVT servlet is vulnerable to unauthenticated remote code execution
CVE-2026-12354 7.5 HIGH IBM MQ Resource Adapter IVT message-driven bean is vulnerable to remote code execution via
CVE-2026-12752 7.1 HIGH Multiple security vulnerabilities addressed with IBM Business Automation Workflow August 2
CVE-2026-12667 7.1 HIGH IBM MQ .NET client is vulnerable to XML external entity injection
CVE-2026-12150 7.0 HIGH IBM MQ queue manager is vulnerable to denial of service
CVE-2026-11864 6.5 MEDIUM Multiple security vulnerabilities are addressed with IBM Cloud Pak for Business Automation
CVE-2026-12750 6.4 MEDIUM Multiple security vulnerabilities are addressed with IBM Cloud Pak for Business Automation
CVE-2026-12749 6.4 MEDIUM Multiple security vulnerabilities are addressed with IBM Cloud Pak for Business Automation
CVE-2026-12751 5.4 MEDIUM Multiple security vulnerabilities are addressed with IBM Cloud Pak for Business Automation
CVE-2026-12742 5.4 MEDIUM Multiple secuirty vulnerabilies addressed with IBM Business Automation Workflow August 202
CVE-2026-11918 5.4 MEDIUM IBM ContextForge MCP Gateway is affected by security filter bypass via nested payload stru
CVE-2026-11921 Security vulnerabilities have been addressed in IBM Verify Identity Access and IBM Securit
CVE-2026-11929 Security vulnerabilities have been addressed in IBM Verify Identity Access and IBM Securit
CVE-2026-12358 Security vulnerabilities have been addressed in IBM Verify Identity Access and IBM Securit
CVE-2026-11926 Security vulnerabilities have been addressed in IBM Verify Identity Access and IBM Securit

Showing top 20 of 25 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: MQ
Same vendor: IBM
Same weakness: CWE-787

V. Comments for CVE-2026-11728

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