CVE-2026-28420

Severity CVSS v4.0:

Pending analysis

Type:

CWE-122 Heap-based Buffer Overflow

Publication date:

27/02/2026

Last modified:

28/02/2026

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&#39;s terminal emulator when processing maximum combining characters from Unicode supplementary planes. Version 9.2.0076 fixes the issue.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L CVSS v3.1 Severity and Metrics:

Base Score: 4.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): Low

Base Score 3.x

4.40

Severity 3.x

MEDIUM

References to Advisories, Solutions, and Tools

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