CVE-2026-28420

Name: CVE-2026-28420
Creator: NVD / NIST
Published: 2026-02-27T22:16:25.33+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.4/10EPSS 0.18%

Last modified Jun 17, 2026

CVE-2026-28420 is a medium-severity vulnerability rated 4.4/10 on the CVSS scale. 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. EPSS estimates a 0.18% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

4.4/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

EPSS Probability

0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vim	Vim	< 9.2.0076

References

https://github.com/vim/vim/commit/bb6de2105b160e729c34063Patch
https://github.com/vim/vim/releases/tag/v9.2.0076Product
https://github.com/vim/vim/security/advisories/GHSA-rvj2-jrf9-2phgPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/02/27/9Mailing List, Patch, Third Party Advisory

Timeline

Published: Feb 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-28420?

How severe is CVE-2026-28420?

CVE-2026-28420 has a CVSS score of 4.4/10 (MEDIUM severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.

How do I fix CVE-2026-28420?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-28420?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST