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CVE-2026-12727— IBM MQ Buffer Overflow

Quick assessment

Affected
IBM MQ Operator
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 在处理特制的对象名称时，可能因存在差一（off-by-one）缓冲区溢出漏洞，导致已认证的攻击者引发潜在的流程不稳定。

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 89

VendorProduct Version RangeStatus
IBM MQ Advanced container images 9.4.0.6-r1≤ r1, 9.4.0.6-r2, 9.4.0.7-r1, 9.4.0.10-r1, 9.4.0.10-r2, 9.4.0.11-r1, 9.4.0.11-r2, 9.4.0.11-r3, 9.4.0.1 affected
9.4.0.6-r2 affected
9.4.0.7-r1 affected
9.4.0.10-r1 affected
9.4.0.10-r2 affected
9.4.0.11-r1 affected
9.4.0.11-r2 affected
9.4.0.11-r3 affected
… +63 more rows
IBM MQ Operator 3.2.0≤ 3.2.29 affected
3.3.0< 3.4.0 affected
3.4.1 affected
3.5.0 affected
3.5.1≤ 3.5.3 affected
3.6.0≤ 3.6.4 affected
3.7.0≤ 3.7.2 affected
3.8.0 affected
… +10 more rows
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I. Basic Information for CVE-2026-12727

Vulnerability Information
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Vulnerability Title
IBM MQ Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
IBM MQ could allow an authenticated attacker to cause potential process instability due to an off-by-one buffer overflow when processing specially crafted object names.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
IBM MQ Operator 3.2.0 ~ 3.2.29 -
IBM MQ Advanced container images 9.4.0.6-r1 ~ r1, 9.4.0.6-r2, 9.4.0.7-r1, 9.4.0.10-r1, 9.4.0.10-r2, 9.4.0.11-r1, 9.4.0.11-r2, 9.4.0.11-r3, 9.4.0.12-r1, 9.4.0.15-r1 - 9.4.0.15-r4, 9.4.0.16-r1, 9.4.0.16-r2, 9.4.0.17-r1, 9.4.0.17-r2, 9.4.0.20-r1, 9.4.0.21-r1, 9.4.0.21-r2, 9.4.0.25-r1 - 9.4.0.25-r3, 9.4. -

II. Public POCs for CVE-2026-12727

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III. Intelligence Information for CVE-2026-12727

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Same Patch Batch · IBM · 2026-10-19 · 38 CVEs total

CVE-2026-107400 8.8 HIGH Security Vulnerability identified in IBM TRIRIGA - GWT Mock Authentication
CVE-2026-109126 8.8 HIGH IBM Verify Identity Access and IBM Security Verify Access Hard-coded Credentials
CVE-2026-10572 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-10574 8.8 HIGH IBM MQ Buffer Overflow
CVE-2026-10743 8.8 HIGH IBM MQ Race Condition
CVE-2026-105453 8.4 HIGH IBM Sterling Connect:Direct for Unix Improper Privilege Management
CVE-2026-107366 8.3 HIGH Langflow OSS Authorization Bypass Through User-Controlled Key
CVE-2026-12665 8.1 HIGH IBM MQ Buffer Overflow
CVE-2026-6719 7.5 HIGH IBM Concert Software Use of Insufficiently Random Values
CVE-2026-12148 7.5 HIGH IBM MQ Deserialization of Untrusted Data
CVE-2026-3295 7.4 HIGH IBM Cloud Pak System Cross-Site Scripting
CVE-2026-19178 6.8 MEDIUM TS4500 Tape Library Race Condition
CVE-2026-12155 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2026-12343 6.5 MEDIUM IBM MQ Denial of Service
CVE-2026-11829 6.5 MEDIUM IBM MQ Buffer Overflow
CVE-2026-12350 6.5 MEDIUM IBM MQ Deserialization of Untrusted Data
CVE-2026-14511 6.5 MEDIUM IBM MQ Denial of Service
CVE-2025-36061 6.5 MEDIUM TS4500 Tape Library Denial of Service
CVE-2025-36252 6.3 MEDIUM TS4500 Tape Library Insufficient Session Expiration
CVE-2026-4413 6.1 MEDIUM IBM Concert Software Cross-Site Scripting

Showing top 20 of 38 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: MQ Operator
Same vendor: IBM
Same weakness: CWE-193

V. Comments for CVE-2026-12727

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