CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HCVE-2026-12356
High (7.5).
IBM MQ 9.2.0.0 through 9.2.0.44 LTS, 9.3.0.0 through 9.3.0.42 LTS, 9.4.0.0 through 9.4.0.26 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 through 10.0.0.5 LTS and CD could allow an authenticated user with command queue access to execute arbitrary code by injecting malicious arguments into Ant script commands.
Severity
- CWE
- CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)
- OWASP Top 10
- A05:2025 Injection
- Published
- Modified
- Record from
- the NVD, synced
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Explain CVE-2026-12356 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-12356?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-12356?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-12356 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| IBM MQ | from 9.2.0.0 through 9.2.0.44 |
| IBM MQ | from 9.3.0.0 through 9.3.0.42 |
| IBM MQ | from 9.4.0.0 through 9.4.0.26 |
| IBM MQ | from 9.4.0.0 through 9.4.5.1 |
| IBM MQ | from 10.0.0.0 through 10.0.0.5 |
Attack patterns (CAPEC)
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits. More on the page of CWE-74 (37).