What is CVE-2026-51400?

CVE-2026-51400 is a high-severity vulnerability in Vim, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.4/10. Published 2026-08-04.

How severe is CVE-2026-51400?

High severity. CVSS v3 base score is 8.4 out of 10.

Vulnerability in Vim

CVE-2026-51400

An issue in Vim Project v9.2.0389 and earlier allows a local attacker to execute arbitrary code via the vms_fixfilename() function within file vim/src/os_vms.c

EPSS: 0.001 (2.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Vim
N/a — versions n/a

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2026-51400?: CVE-2026-51400 is a high-severity vulnerability in Vim, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 8.4/10. Published 2026-08-04.
How severe is CVE-2026-51400?: High severity. CVSS v3 base score is 8.4 out of 10.