---
id: CVE-2019-5064
aliases:
  - GHSA-q799-q27x-vp7w
  - PYSEC-2026-2802
  - PYSEC-2026-2828
  - PYSEC-2026-2841
  - PYSEC-2026-725
title: Out-of-bounds Write in OpenCV
summary: Out-of-bounds Write in OpenCV
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: opencv-python
product: opencv-python
ecosystem: pip
affected:
  - opencv-python < 4.2.0.32
  - opencv-python-headless < 4.2.0.32
  - opencv-contrib-python < 4.2.0.32
  - opencv-contrib-python-headless < 4.2.0.32
patched:
  - opencv-python 4.2.0.32
  - opencv-python-headless 4.2.0.32
  - opencv-contrib-python 4.2.0.32
  - opencv-contrib-python-headless 4.2.0.32
published: '2021-10-12'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:09.348814739Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-q799-q27x-vp7w'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2019-5064'
  - url: 'https://github.com/opencv/opencv/issues/15857'
  - url: 'https://github.com/opencv/opencv-python'
  - url: 'https://github.com/opencv/opencv-python/releases/tag/32'
  - url: 'https://github.com/opencv/opencv/releases/tag/4.2.0'
  - url: 'https://talosintelligence.com/vulnerability_reports/TALOS-2019-0853'
  - url: 'https://www.oracle.com//security-alerts/cpujul2021.html'
  - url: 'https://www.oracle.com/security-alerts/cpuApr2021.html'
tags:
  - osv
  - pip
epss: 0.10704
epssPercentile: 0.95612
ingestedAt: '2026-07-08T18:25:52.119Z'
---

## Overview

An exploitable heap buffer overflow vulnerability exists in the data structure persistence functionality of OpenCV, version 4.1.0 (corresponds with OpenCV-Python version 4.1.2.30). A specially crafted JSON file can cause a buffer overflow, resulting in multiple heap corruptions and potentially code execution. An attacker can provide a specially crafted file to trigger this vulnerability.

## Affected packages

- `opencv-python < 4.2.0.32`
- `opencv-python-headless < 4.2.0.32`
- `opencv-contrib-python < 4.2.0.32`
- `opencv-contrib-python-headless < 4.2.0.32`

## Remediation

Upgrade to a patched release:

- `opencv-python 4.2.0.32`
- `opencv-python-headless 4.2.0.32`
- `opencv-contrib-python 4.2.0.32`
- `opencv-contrib-python-headless 4.2.0.32`