CVE-2026-28418: Vim has Heap-based Buffer Overflow in Emacs tags parsing

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% 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-122

Description

Vim is an open source, command line text editor. Prior to version 9.2.0074, a heap-based buffer overflow out-of-bounds read exists in Vim's Emacs-style tags file parsing logic. When processing a malformed tags file, Vim can be tricked into reading up to 7 bytes beyond the allocated memory boundary. Version 9.2.0074 fixes the issue.

Affected products

vim/vim: before 9.2.0074 — fixed in 9.2.0074

How to fix

Upgrade to a fixed version: vim/vim 9.2.0074. Check the vendor advisory for mitigations.

References

https://github.com/vim/vim/commit/f6a7f469a9c0d09e84cd6cb
https://github.com/vim/vim/releases/tag/v9.2.0074
https://github.com/vim/vim/security/advisories/GHSA-h4mf-vg97-hj8j
http://www.openwall.com/lists/oss-security/2026/02/27/7

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