CVE-2026-28420

Vim has Heap-based Buffer Overflow and OOB Read in :terminal

State: Published
Severity: 4.4 Medium
Published: Feb 27, 2026
Updated: Mar 2, 2026
Reserved: Feb 27, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.4 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L	GitHub_M

Weaknesses

CWE-122 Heap-based Buffer Overflow
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
vimvim	< 9.2.0076Affected

References

https://github.com/vim/vim/security/advisories/GHSA-rvj2-jrf9-2phg
https://github.com/vim/vim/commit/bb6de2105b160e729c34063
https://github.com/vim/vim/releases/tag/v9.2.0076
http://www.openwall.com/lists/oss-security/2026/02/27/9

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