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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

Published
Jul 29, 2026
Updated
Jul 29, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed

Blast Radius

1 pkg affected
🐹github.com/tinfoil-factory/netfoil

Real-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

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/tinfoil-factory/netfoilall versions0.4.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    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.

  2. 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.

  3. 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.

  4. 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

### 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.
O3 Security · Impact-Aware SCA

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.