CVE-2026-10858

IBM MQ for HPE NonStop 8.1.0 through 8.1.0.40 could allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code due to a heap buffer underflow when processing multi-segment messages.

  • Published Sep 18, 2026
  • CVSS 9.9 critical
  • 0.4% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-10858 at the National Vulnerability Database