CVE-2024-27758
HIGHCVE-2024-27758 is a high-severity (CVSS 8.4) Missing Authentication vulnerability in rpyc. O3 Security confirms whether CVE-2024-27758 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
RPyC's missing security check results in code execution when using numpy.array on the server-side.
Real-World Exposure
rpycReal-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 RPyC before 6.0.0, when a server exposes a method that calls the attribute named array for a client-provided netref (e.g., np.array(client_netref)), a remote attacker can craft a class that results in remote code execution.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | rpyc | ≥ 4.0.0&&< 6.0.0 | 6.0.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for rpyc. 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 rpyc to 6.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-27758 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 CVE-2024-27758 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 CVE-2024-27758. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-27758 in your dependencies?
O3 detects CVE-2024-27758 across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.