Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Vim | Vim | < 9.2.0076 |
Related Weaknesses (CWE)
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-jrf9-2phgPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/02/27/9Mailing ListPatchThird Party Advisory
FAQ
What is CVE-2026-28420?
CVE-2026-28420 is a vulnerability with a CVSS score of 4.4 (MEDIUM). 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 combin...
How severe is CVE-2026-28420?
CVE-2026-28420 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-28420?
Check the references section above for vendor advisories and patch information. Affected products include: Vim Vim.