Affects IBM MQ, a widely used enterprise messaging platform; can enable remote code execution or service disruption across business systems.
CVE-2026-10027
Buffer overflow in IBM MQ channels with compression enables RCE or DoS.
Is CVE-2026-10027 being exploited?
Not confirmed. CVE-2026-10027 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-10027?
CVE-2026-10027 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-10027?
Yes. A fix has been recorded for CVE-2026-10027. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-10027 affect?
CVE-2026-10027 affects IBM MQ (channels with compression enabled). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-10027?
Apply IBM patch immediately; disable compression and restrict MQ channel access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution or denial of service via crafted compressed data on MQ channels with compression enabled.
Immediate action required
- affected>= 9.1.0.0 and <= 9.1.0.37 LTS
- affected>= 9.2.0.0 and <= 9.2.0.43 LTS
- affected>= 9.3.0.0 and <= 9.3.0.41 LTS
- affected>= 9.3.0.0 and <= 9.3.5.1 CD
- affected>= 9.4.0.0 and <= 9.4.0.25 LTS
- affected>= 9.4.0.0 and <= 9.4.5.1 CD
- affected10.0.0.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.