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MEDIUM severity

Out-of-bounds Write in OpenCVGHSA-634c-v2xv-ffpg

MEDIUMFix: opencv/opencv#9448

GHSA-634c-v2xv-ffpg is a medium-severity (CVSS 6.5) Out-of-bounds Write vulnerability in opencv-python. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for opencv-python — see the affected versions and patch details below.

Also known asCVE-2017-14136PYSEC-2026-2808PYSEC-2026-700
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
2 known
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.6%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs76th percentile — riskier than 76% of all scored CVEsHighest risk
0.51%1.05%1.59%2.14%1.0%1.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐍opencv-python🐍opencv-contrib-python

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

OpenCV (Open Source Computer Vision Library) 3.3 (corresponding to OpenCV-Python 3.3.0.9) has an out-of-bounds write error in the function FillColorRow1 in utils.cpp when reading an image file by using cv::imread. NOTE: this vulnerability exists because of an incomplete fix for CVE-2017-12597.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPIopencv-pythonall versions3.3.1.11pip install --upgrade 'opencv-python==3.3.1.11'
🐍PyPIopencv-contrib-pythonall versions3.3.1.11pip install --upgrade 'opencv-contrib-python==3.3.1.11'

Affected Products

2 products · 2 configurations
OS
debian linuxdebian
1 version
8.0
Application
opencvopencv
1 version
3.3.0
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

OpenCV (Open Source Computer Vision Library) 3.3 has an out-of-bounds wr…

github.comNVDMar 2019

Report on github.com

github.comNVDMar 2019

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for opencv-python, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update opencv-python to 3.3.1.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-634c-v2xv-ffpg is resolved across your whole dependency graph.

  3. Workarounds

    Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.

Frequently Asked Questions

OpenCV (Open Source Computer Vision Library) 3.3 (corresponding to OpenCV-Python 3.3.0.9) has an out-of-bounds write error in the function FillColorRow1 in utils.cpp when reading an image file by using cv::imread. NOTE: this vulnerability exists because of an incomplete fix for CVE-2017-12597.
O3 Security · Impact-Aware SCA

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Out-of-bounds Write in OpenCV (Medium 6.5)