CVE-2026-12155
IBM MQ Deserialization of Untrusted Data
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
IBM MQ could allow an authenticated attacker to cause a denial of service by sending specially crafted multicast status messages that trigger a NULL pointer dereference.
| CWE | CWE-502 |
| Vendor | ibm |
| Product | mq operator |
| Published | Oct 19, 2026 |
| Last Updated | Oct 19, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
IBM / MQ Operator
3.2.0 ≤ 3.2.29 3.3.0 < 3.4.0 3.4.1 3.5.0 3.5.1 ≤ 3.5.3 3.6.0 ≤ 3.6.4 3.7.0 ≤ 3.7.2 3.8.0 3.8.1 3.9.0 3.9.1 3.9.2 4.0.0 4.0.1 4.0.2 4.0.3 4.0.4 2.0.0 ≤ 2.0.29
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, 9.4.0.26-r1CD: 9.4.1.0-r1, 9.4.1.0-r2, 9.4.1.1-r1, 9.4.2.0-r1, 9.4.2.0-r2, 9.4.2.1-r1, 9.4.2.1-r2, 9.4.3.0-r1, 9.4.3.0-r2, 9.4.3.1-r1 - 9.4.3.1-r3, 9.4.4.0-r1 - 9.4.4.0-r4, 9.4.4.1-r1, 9.4.5.0-r1, 9.4.5.0-r2, 9.4.5.1-r1, 10.0.0.0-r1 - 10.0.0.0-r4, 10.0.0.5-r1LTS: 9.3.0.0-r1, 9.3.0.0-r2, 9.3.0.0-r3, 9.3.0.1-r1, 9.3.0.1-r2, 9.3.0.1-r3, 9.3.0.1-r4, 9.3.0.3-r1, 9.3.0.4-r1, 9.3.0.4-r2, 9.3.0.5-r1, 9.3.0.5-r2, 9.3.0.5-r3, 9.3.0.6-r1, 9.3.0.10-r1, 9.3.0.10-r2, 9.3.0.11-r1,9.3.0.11-r2, 9.3.0.15-r1, 9.3.0.16-r1, 9.3.0.16-r2, 9.3.0.17-r1, 9.3.0.17-r2, 9.3.0.17-r3, 9.3.0.20-r1, 9.3.0.20-r2, 9.3.0.21-r1, 9.3.0.21-r2, 9.3.0.21-r3, 9.3.0.25-r1, 9.4.0.0-r1, 9.4.0.0-r2, 9.4.0.0-r3, 9.4.0.5-r1, 9.4.0.5-r2 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 9.4.0.26-r1 9.4.1.0-r1 9.4.1.0-r2 9.4.1.1-r1 9.4.2.0-r1 9.4.2.0-r2 9.4.2.1-r1 9.4.2.1-r2 9.4.3.0-r1 9.4.3.0-r2 9.4.3.1-r1 ≤ 9.4.3.1-r3 9.4.4.0-r1 9.4.4.1-r1 9.4.5.0-r1 9.4.5.0-r2 9.4.5.1-r1 10.0.0.0-r1 ≤ 10.0.0.0-r4 10.0.0.5-r1 9.3.0.0-r1 9.3.0.0-r2 9.3.0.0-r3 9.3.0.1-r1 9.3.0.1-r2 9.3.0.1-r3 9.3.0.1-r4 9.3.0.3-r1 9.3.0.4-r1 9.3.0.4-r2 9.3.0.5-r1 9.3.0.5-r2 9.3.0.5-r3 9.3.0.6-r1 9.3.0.10-r1 9.3.0.10-r2 9.3.0.11-r1 9.3.0.11-r2 9.3.0.15-r1 9.3.0.16-r1 9.3.0.16-r2 9.3.0.17-r1 9.3.0.17-r2 9.3.0.17-r3 9.3.0.20-r1 9.3.0.20-r2 9.3.0.21-r1 9.3.0.21-r2 9.3.0.21-r3 9.3.0.25-r1 9.4.0.0-r1 9.4.0.0-r2 9.4.0.0-r3 9.4.0.5-r1 9.4.0.5-r2