CVE-2026-12343
mediumIBM 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…
Vendor / product: Ibm — mq operator
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
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (psirt@us.ibm.com)
Timeline (UTC)
Published: 2026-10-19 17:17
Modified: 2026-10-23 17:27
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:04 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
ibm / mq_operator ≥2.0.0 ≤2.0.29, ≥3.2.0 ≤3.2.29, 3.3.0, 3.4.0, 3.4.1, 3.5.0
ibm / supplied_mq_advanced_container_images 9.4.1.0, 9.4.1.1, 9.4.2.0, 9.4.2.1, 9.4.3.0, 9.4.3.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://www.ibm.com/support/pages/node/7292667
References
- https://www.ibm.com/support/pages/node/7292667 psirt@us.ibm.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:04 UTC · record ↗