GHSA-jggw-2q6g-c3m6 is a medium-severity (CVSS 6.5) Out-of-bounds Read vulnerability in opencv-python. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for opencv-python — see the affected versions and patch details below.
EPSS Exploitation Probability
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
opencv-python🐍opencv-python-headless🐍opencv-contrib-python🐍opencv-contrib-python-headlessReal-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
An out-of-bounds read was discovered in OpenCV before 4.1.1 (OpenCV-Python before 4.1.0.25). Specifically, variable coarsest_scale is assumed to be greater than or equal to finest_scale within the calc()/ocl_calc() functions in dis_flow.cpp. However, this is not true when dealing with small images, leading to an out-of-bounds read of the heap-allocated arrays Ux and Uy.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | opencv-python | all versions | 4.1.0.25pip install --upgrade 'opencv-python==4.1.0.25' |
| 🐍PyPI | opencv-python-headless | all versions | 4.1.0.25pip install --upgrade 'opencv-python-headless==4.1.0.25' |
| 🐍PyPI | opencv-contrib-python | all versions | 4.1.0.25pip install --upgrade 'opencv-contrib-python==4.1.0.25' |
| 🐍PyPI | opencv-contrib-python-headless | all versions | 4.1.0.25pip install --upgrade 'opencv-contrib-python-headless==4.1.0.25' |
Affected Products
opencvopencventerprise linuxredhatResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
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.
Fix
Update opencv-python to 4.1.0.25 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-jggw-2q6g-c3m6 is resolved across your whole dependency graph.
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
Is GHSA-jggw-2q6g-c3m6 in your dependencies?
Find it across PyPI, including transitive dependencies.