CVE-2026-12666CWE-611xxe

CVE-2026-12666

High · published September 15, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
17.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00264 · 17.3th percentile
Weakness
CWE-611 · Improper Restriction of XML External Entity Reference
Published
2026-09-15T22:17Z
References (1)
https://www.ibm.com/support/pages/node/7284939 · [email protected]
EPSS history
Timeline
  • 17 SEP 03:28Z
    EPSS moved — → 0%
    epss
  • 15 SEP 17:08Z
    IBM MQ Java messaging is vulnerable to XML external entity injection
    cvelistv5