---
id: CVE-2016-1516
aliases:
  - GHSA-cvhw-2593-5j2q
  - PYSEC-2026-2816
  - PYSEC-2026-707
title: Double Free in OpenCV
summary: Double Free in OpenCV
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.0/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 < 3.3.1.11
  - opencv-contrib-python < 3.3.1.11
patched:
  - opencv-python 3.3.1.11
  - opencv-contrib-python 3.3.1.11
published: '2021-10-12'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:49:09.090921753Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-cvhw-2593-5j2q'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2016-1516'
  - url: 'https://github.com/opencv/opencv/issues/5956'
  - url: 'https://github.com/opencv/opencv/pull/9376'
  - url: 'https://arxiv.org/pdf/1701.04739.pdf'
  - url: 'https://github.com/opencv/opencv-python'
  - url: 'https://lists.debian.org/debian-lts-announce/2018/07/msg00030.html'
  - url: 'https://lists.debian.org/debian-lts-announce/2021/10/msg00028.html'
tags:
  - osv
  - pip
epss: 0.02356
epssPercentile: 0.82835
ingestedAt: '2026-07-08T18:25:48.582Z'
---

## Overview

OpenCV 3.0.0 has a double free issue that allows attackers to execute arbitrary code. This issue was fixed in OpenCV version 3.3.1 (corresponding to OpenCV-Python and and OpenCV-Contrib-Python 3.3.1.11).

## Affected packages

- `opencv-python < 3.3.1.11`
- `opencv-contrib-python < 3.3.1.11`

## Remediation

Upgrade to a patched release:

- `opencv-python 3.3.1.11`
- `opencv-contrib-python 3.3.1.11`