What’s Vulnerable › Vulnerabilities
CVE-2026-12666: IBM MQ Java messaging is vulnerable to XML external entity injection
- Severity: high (CVSS 8.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-09-15 · updated 2026-09-17
- Weakness: CWE-611
Description
IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 Classes for Java could allow an authenticated attacker to obtain sensitive information or cause a denial of service due to XML external entity injection in MQRFH2 header processing.
Affected products
- IBM MQ: from 9.1.0.0 through 9.1.0.37 LTS; from 9.2.0.0 through 9.2.0.43 LTS; from 9.3.0.0 through 9.3.0.41 LTS; from 9.3.0.0 through 9.3.5.1 CD; from 9.4.0.0 through 9.4.0.25 LTS; from 9.4.0.0 through 9.4.5.1 CD
References
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