Buffer overflow in Ibm I

CVE-2026-18846

IBM i 7.6, 7.5, 7.4, and 7.3 s vulnerable to a buffer overflow from improperly validating client data. By sending malformed requests to one of the host servers, a remote attacker could leverage this vulnerability to cause a denial-of-server (DoS) for that server.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

  • Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-18846?
CVE-2026-18846 is a high-severity vulnerability in Ibm I, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-08-13.
How severe is CVE-2026-18846?
High severity. CVSS v3 base score is 7.5 out of 10.