CVE-2026-12665
8.1HighPublished 19 Oct 2026 · NVD status: Received · AI triage by gemini-3.8-flash
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
- Impact
- Full C/I/A compromise
- Weakness
- CWE-121
Impact
Remote attackers can execute arbitrary code on the IBM MQ server by initiating a TLS channel connection with a crafted certificate. No credentials or prior privileges are required.
Root cause
A stack buffer overflow occurs when IBM MQ parses malformed distinguished names during TLS certificate validation.
Affected systems
Versions not listed — check the vendor advisory.
CVSS v3.1 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Fix & remediation
Apply the vendor fix from the IBM advisory; if immediate patching is not possible, restrict network access to IBM MQ channel ports (default 1414) to trusted IP addresses only.
$ dspmqverAI-suggested. Run it in staging first and check it against the vendor advisory. Why?
NVD description
IBM MQ could allow a remote attacker to execute arbitrary code due to a stack buffer overflow when processing TLS certificates with malformed distinguished names during channel connection establishment.