Vulnerability · Published Sep 18, 2026 · Assigned by ibm
CVE-2026-10747IBM MQ Appliance is affected by a heap buffer overflow vulnerability in protocol message processing
Critical 10.0
In plain English
A critical-severity heap buffer overflow in MQ Appliance from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities).
Severity (CVSS 3.1)10.0Critical
Exploit odds (30 days)0.9%top 38.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM MQ Appliance could allow a remote attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer overflow in protocol message processing before authentication.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | MQ Appliance | 9.4 LTS – through 9.4.0.0 to 9.4.0.259.4 CD – through 9.4.1.0 to 9.4.5.210.0.0.0 – through 10.0.0.1 only |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://www.ibm.com/support/pages/node/7284690 vendor-advisory, patch