CVE-2026-28420

MEDIUM 4.4CVE-2026-28420 · Published 27/02/2026 · updated 17/06/2026

In short

CVE-2026-28420 is a MEDIUM (CVSS 4.4) vulnerability affecting vim (vim).
Chance of exploitation in the next 30 days (EPSS): 0.21%, higher than 10.7% of all vulnerabilities.
Fix: update to 9.2.0076 or later.

Package	Affected versions	Patched versions
vim vim	`< 9.2.0076`	`9.2.0076`

Description

Vim is an open source, command line text editor. Prior to version 9.2.0076, a heap-based buffer overflow WRITE and an out-of-bounds READ exist in Vim's terminal emulator when processing maximum combining characters from Unicode supplementary planes. Version 9.2.0076 fixes the issue.

References

vim/vim commit bb6de21 · Patch
vim/vim release v9.2.0076 · Product
vim/vim security advisory · Patch
openwall.com/lists/oss-security/2026/02/27/9 · Mailing List

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Package

Affected versions

Patched versions

vim

< 9.2.0076

9.2.0076

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