GHSA-3vpc-4p9p-47hc
curl_cffi bundles a version of libcurl affected by High Severity vulnerability
Blast Radius
curl-cffiReal-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
Summary
curl_cffi is potentially affected by High Severity vulnerability (CVE-2023-38545) in libcurl<8.4.0
Details
HIGH severity vulnerability in curl and libcurl: announcement Details are still unknown, but seems it will be a major issue as it's advertised by curl devs as "probably the worst curl security flaw in a long time". A patched version (8.4.0) and details will be published around 06:00 UTC on October 11. curl_cffi wheels on PyPI ship with libcurl 7.84.0
PoC
Resolution
Versions after 0.7 bundles with libcurl>=8.5, which is not affected by this issue.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐍PyPI | curl-cffi | all versions | 0.7.0b6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for curl-cffi. 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 curl-cffi to 0.7.0b6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3vpc-4p9p-47hc 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-3vpc-4p9p-47hc 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-3vpc-4p9p-47hc. 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-3vpc-4p9p-47hc in your dependencies?
O3 detects GHSA-3vpc-4p9p-47hc across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.