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TI-2026-10839 Aliases CVE-2026-12666GHSA-8mq2-hm2c-3ccx

IBM MQ Java messaging is vulnerable to XML external entity injection

Priority LOW 36CWE-611Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00462 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMMQ9.1.0.0 – 9.1.0.37 LTS; 9.2.0.0 – 9.2.0.43 LTS; 9.3.0.0 – 9.3.0.41 LTS; 9.3.0.0 – 9.3.5.1 CD; 9.4.0.0 – 9.4.0.25 LTS; 9.4.0.0 – 9.4.5.1 CD; 10.0.0.0—No fix listedCNA
  • MQ VendorIBM Affected 9.1.0.0 – 9.1.0.37 LTS; 9.2.0.0 – 9.2.0.43 LTS; 9.3.0.0 – 9.3.0.41 LTS; 9.3.0.0 – 9.3.5.1 CD; 9.4.0.0 – 9.4.0.25 LTS; 9.4.0.0 – 9.4.5.1 CD; 10.0.0.0 Fixed in — No fix listed CNA

CPE names CNA · 11

CPEVersionsRoleVendor
cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:*:*:*:*9.1.0.0—IBM
cpe:2.3:a:ibm:mq:9.1.0.37:*:*:*:*:*:*:*9.1.0.37—IBM
cpe:2.3:a:ibm:mq:9.2.0.0:*:*:*:*:*:*:*9.2.0.0—IBM
cpe:2.3:a:ibm:mq:9.2.0.43:*:*:*:*:*:*:*9.2.0.43—IBM
cpe:2.3:a:ibm:mq:9.3.0.0:*:*:*:*:*:*:*9.3.0.0—IBM
cpe:2.3:a:ibm:mq:9.3.0.41:*:*:*:*:*:*:*9.3.0.41—IBM
cpe:2.3:a:ibm:mq:9.3.5.1:*:*:*:*:*:*:*9.3.5.1—IBM
cpe:2.3:a:ibm:mq:9.4.0.0:*:*:*:*:*:*:*9.4.0.0—IBM
cpe:2.3:a:ibm:mq:9.4.0.25:*:*:*:*:*:*:*9.4.0.25—IBM
cpe:2.3:a:ibm:mq:9.4.5.1:*:*:*:*:*:*:*9.4.5.1—IBM
  • cpe:2.3:a:ibm:mq:9.1.0.0:*:*:*:*:*:*:* Versions 9.1.0.0 — ·IBM
  • cpe:2.3:a:ibm:mq:9.1.0.37:*:*:*:*:*:*:* Versions 9.1.0.37 — ·IBM
  • cpe:2.3:a:ibm:mq:9.2.0.0:*:*:*:*:*:*:* Versions 9.2.0.0 — ·IBM
  • cpe:2.3:a:ibm:mq:9.2.0.43:*:*:*:*:*:*:* Versions 9.2.0.43 — ·IBM
  • cpe:2.3:a:ibm:mq:9.3.0.0:*:*:*:*:*:*:* Versions 9.3.0.0 — ·IBM
  • cpe:2.3:a:ibm:mq:9.3.0.41:*:*:*:*:*:*:* Versions 9.3.0.41 — ·IBM
  • cpe:2.3:a:ibm:mq:9.3.5.1:*:*:*:*:*:*:* Versions 9.3.5.1 — ·IBM
  • cpe:2.3:a:ibm:mq:9.4.0.0:*:*:*:*:*:*:* Versions 9.4.0.0 — ·IBM
  • cpe:2.3:a:ibm:mq:9.4.0.25:*:*:*:*:*:*:* Versions 9.4.0.25 — ·IBM
  • cpe:2.3:a:ibm:mq:9.4.5.1:*:*:*:*:*:*:* Versions 9.4.5.1 — ·IBM
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:ibm:mq:10.0.0.0:*:*:*:*:*:*:*10.0.0.0—IBM
  • cpe:2.3:a:ibm:mq:10.0.0.0:*:*:*:*:*:*:* Versions 10.0.0.0 — ·IBM

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-12666
  2. 2026-10-03 Alias added: GHSA-8mq2-hm2c-3ccx

References

Patch 1

  • TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
See all 9711 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences