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CVE-2026-11378— IBM MQ queue manager 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 可能存在一个整数溢出漏洞，影响其分发列表（distribution list）处理逻辑。该漏洞可能被经过身份验证的攻击者利用，以导致拒绝服务（DoS），或在特定条件下实现任意代码执行。 关键词说明： Authenticated attacker：经过身份验证的攻击者（需要有效凭证，但可能是低权限用户） Integer overflow：整数溢出（常见于数值计算中，当结果超出固定大小整数的表示范围时发生） Distribution list processing：分发列表处理（IBM MQ 中用于将消息

CVSS 8.8 · High EPSS 0.60% · P49

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-11378

Vulnerability Information
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Vulnerability Title
IBM MQ queue manager is vulnerable to remote code execution
Source: CVE Program / CVE List V5
Vulnerability Description
IBM MQ could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to an integer overflow in distribution list processing.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
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-2026-11378

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III. Intelligence Information for CVE-2026-11378

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Other References for CVE-2026-11378 (1)

Same Patch Batch · IBM · 2026-09-18 · 90 CVEs total

CVE-2026-10747 10.0 CRITICAL IBM MQ Appliance is affected by a heap buffer overflow vulnerability in protocol message p
CVE-2025-15399 10.0 CRITICAL Multiple vulnerabilities affect IBM License Key Server Administration and Reporting Tool a
CVE-2026-10858 9.9 CRITICAL IBM MQ for HPE NonStop is vulnerable to a denial of service attack
CVE-2026-84064 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-80442 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84075 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84078 9.9 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84082 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-81657 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82340 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-80441 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82967 9.8 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-82832 9.6 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84073 9.1 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-75878 9.1 CRITICAL IBM Sterling File Gateway is Vulnerable to Authentication Bypass
CVE-2026-84031 9.0 CRITICAL IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84070 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84106 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-84074 8.9 HIGH IBM Guardium Data Protection is affected by multiple vulnerabilities.
CVE-2026-11375 8.8 HIGH IBM MQ queue manager is vulnerable to remote code execution

Showing top 20 of 90 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: MQ
Same vendor: IBM
Same weakness: CWE-190