Integer overflow in Ibm I

CVE-2026-18671

IBM i 7.6, 7.5, 7.4, and 7.3 could allow an authenticated attacker to force a NetServer server thread exception, caused by an integer overflow during bounds checking in request processing. The attacker could exploit this vulnerability to cause a temporary denial of service.

Vulnerability class: Integer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.

Affected products

  • Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-18671?
CVE-2026-18671 is a medium-severity vulnerability in Ibm I, classified under Integer Overflow or Wraparound. CVSS score: 6.5/10. Published 2026-08-13.
How severe is CVE-2026-18671?
Medium severity. CVSS v3 base score is 6.5 out of 10.