GHSA-89rj-5ggj-3p9p is a medium-severity (CVSS 5.5) Reachable Assertion vulnerability in opencv-python. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-89rj-5ggj-3p9p is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Reachable Assertion in OpenCV.
Real-World Exposure
opencv-python🐍opencv-contrib-pythonReal-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
In OpenCV 3.3.1 (corresponds with OpenCV-Python 3.3.1.11), an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | opencv-python | all versions | 3.4.1.15 |
| 🐍PyPI | opencv-contrib-python | all versions | 3.4.1.15 |
Research 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. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update opencv-python to 3.4.1.15 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-89rj-5ggj-3p9p is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-89rj-5ggj-3p9p is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-89rj-5ggj-3p9p. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-89rj-5ggj-3p9p in your dependencies?
O3 detects GHSA-89rj-5ggj-3p9p across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.