What’s Vulnerable › Vulnerabilities

CVE-2026-28422: Vim has stack-buffer-overflow in build_stl_str_hl()

• Severity: low (CVSS 2.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-27 · updated 2026-06-17
• Weakness: CWE-121

Description

Vim is an open source, command line text editor. Prior to version 9.2.0078, a stack-buffer-overflow occurs in `build_stl_str_hl()` when rendering a statusline with a multi-byte fill character on a very wide terminal. Version 9.2.0078 patches the issue.

Affected products

• vim/vim: before 9.2.0078 — fixed in 9.2.0078

How to fix

Upgrade to a fixed version: vim/vim 9.2.0078. Check the vendor advisory for mitigations.

References

• https://github.com/vim/vim/commit/4e5b9e31cb7484ad156f
• https://github.com/vim/vim/releases/tag/v9.2.0078
• https://github.com/vim/vim/security/advisories/GHSA-gmqx-prf2-8mwf
• http://www.openwall.com/lists/oss-security/2026/02/27/11

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