VulnerabilityAnalyzed
CVE-2026-28420
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.
MEDIUM 4.4EPSS 0.18%
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 4.4 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- EPSS
- 0.18% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-125
- Affected
- vim/vim
- Source
- security-advisories@github.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.