CVE-2026-10027 IBM MQ - Buffer Overflow

IBM MQ contains a buffer overflow caused by processing malformed compressed data on channels with compression enabled, letting remote attackers cause denial of service or execute arbitrary code, exploit requires compression enabled on channels.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.45% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution, Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-787

Vendor fix

Update to the latest available version with the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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