GHSA-xvg2-cgv6-6h7v
GHSA-xvg2-cgv6-6h7v is a security vulnerability in github.com/tinfoil-factory/netfoil. O3 Security confirms whether GHSA-xvg2-cgv6-6h7v is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
netfoil: Incorrect block responses could lead to localhost traffic
Blast Radius
github.com/tinfoil-factory/netfoilReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
Summary
0.0.0.0 was used instead of NXDOMAIN for block responses. On Linux, which is the target platform for netfoil, the 0.0.0.0 is sent to localhost rather than just dropped.
Impact
Unintended traffic could be sent to localhost. Impact depends on running services and firewall rules.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/tinfoil-factory/netfoil | all versions | 0.4.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/tinfoil-factory/netfoil. 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 github.com/tinfoil-factory/netfoil to 0.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-xvg2-cgv6-6h7v 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-xvg2-cgv6-6h7v 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-xvg2-cgv6-6h7v. 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-xvg2-cgv6-6h7v in your dependencies?
O3 detects GHSA-xvg2-cgv6-6h7v across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.