What is CVE-2026-16987?

CVE-2026-16987 is a high-severity vulnerability in Ibm I, classified under External Control of File Name or Path. CVSS score: 8.8/10. Published 2026-08-13.

How severe is CVE-2026-16987?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Ibm I

CVE-2026-16987

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to gain elevated privileges due to improper validation of the LANG environment variable.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ibm I — versions 7.6, 7.5, 7.4

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-16987?: CVE-2026-16987 is a high-severity vulnerability in Ibm I, classified under External Control of File Name or Path. CVSS score: 8.8/10. Published 2026-08-13.
How severe is CVE-2026-16987?: High severity. CVSS v3 base score is 8.8 out of 10.