---
id: CVE-2023-4781
title: Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1873.
summary: Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1873.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-122
vendor: neovim
product: neovim
affected:
  - neovim <= 0.9.5
  - vim < 9.0.1873
  - debian_linux = 10.0
  - debian_linux = 11.0
  - macos < 14.1
patched:
  - vim 9.0.1873
  - macos 14.1
published: '2023-09-05'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:59:09.700'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-4781'
references:
  - url: 'http://seclists.org/fulldisclosure/2023/Oct/24'
    label: security@huntr.dev
  - url: 'https://github.com/vim/vim/commit/f6d28fe2c95c678cc3202cc5dc825a3fcc709e93'
    label: security@huntr.dev
  - url: 'https://huntr.dev/bounties/c867eb0a-aa8b-4946-a621-510350673883'
    label: security@huntr.dev
  - url: 'https://lists.debian.org/debian-lts-announce/2023/09/msg00035.html'
    label: security@huntr.dev
  - url: 'https://support.apple.com/kb/HT213984'
    label: security@huntr.dev
  - url: 'http://seclists.org/fulldisclosure/2023/Oct/24'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/vim/vim/commit/f6d28fe2c95c678cc3202cc5dc825a3fcc709e93'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://huntr.dev/bounties/c867eb0a-aa8b-4946-a621-510350673883'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/09/msg00035.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/03/msg00023.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://support.apple.com/kb/HT213984'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00613
epssPercentile: 0.47035
ingestedAt: '2026-06-29T13:24:33.895Z'
---

## Overview

Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.1873.

## Affected

- `neovim <= 0.9.5`
- `vim < 9.0.1873`
- `debian_linux = 10.0`
- `debian_linux = 11.0`
- `macos < 14.1`

## Remediation

Upgrade past the affected range:

- `vim 9.0.1873`
- `macos 14.1`