CVE-2026-12343: CWE-400 Uncontrolled Resource Consumption in IBM MQ Operator
Description
IBM MQ could allow an authenticated attacker to cause a denial of service due to improper validation of RFH2 message header fields in queued publish/subscribe operations.
CVSS v3.1
Score 6.5medium
Affected software
IBM
MQ Operator
IBM
MQ Advanced container images
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM MQ Operator contains a vulnerability (CVE-2026-12343) classified as CWE-400 (Uncontrolled Resource Consumption) where improper validation of RFH2 message header fields in queued publish/subscribe operations can be exploited by an authenticated attacker to cause a denial of service condition. This vulnerability affects a broad range of IBM MQ Operator versions, including multiple minor and patch releases across several major versions. The CVSS 3.1 vector indicates network attack vector, low attack complexity, requires privileges, no user interaction, unchanged scope, no confidentiality or integrity impact, but high impact on availability.
Potential Impact
An authenticated attacker can exploit this vulnerability to cause a denial of service, impacting the availability of the IBM MQ Operator service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits in the wild have been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor IBM's security advisories for updates. In the meantime, restrict authenticated access to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-06-15T18:36:46.988Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ad64a132cdf04f6566e6f40
Added to database: 10/19/2026, 16:49:23 UTC
Last enriched: 10/19/2026, 17:05:45 UTC
Last updated: 10/19/2026, 19:06:46 UTC
Views: 11
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