Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-10027

CVE-2026-10027CRITICAL

IBM MQ queue manager is vulnerable to unauthenticated remote code execution

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0038   29.8     —

AFFECTED
  Product  Versions   Fixed
  MQ       9.1.0.0 –  —

TIMELINE
  May 28  Reserved by ibm
  Sep 18  Published (CNA: ibm)
  Sep 23  RESCORED — CVE-2026-10027 (IBM MQ). CVSS 8.1 → 9.8 (NVD).

CWE-787 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

Description

IBM MQ could allow a remote attacker to cause a denial of service or execute arbitrary code due to a buffer overflow when processing malformed compressed data on channels configured with compression enabled.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
May 28, 2026	Reserved	Reserved by ibm
September 18, 2026	Published	Published (CNA: ibm)
September 23, 2026	RESCORED	RESCORED — CVE-2026-10027 (IBM MQ). CVSS 8.1 → 9.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	MQ	—	9.1.0.0	—

Weaknesses

CWE-787

References (1)

https://www.ibm.com/support/pages/node/7284893 [Patch, Vendor Advisory]

Authoritative record: CVE-2026-10027 at cve.org

Vendors: ibm

Weaknesses: CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-10027 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.