ADVISORY

HIGH: github.com/tinfoil-factory/netfoil — netfoil: Incorrect block responses could lead to localhost traffic

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…

Source github.com/tinfoil-factory/netfoilPublished 5d ago · Jul 29, 2026Posted on Bluesky

What we hold

Package
github.com/tinfoil-factory/netfoil
Ecosystem
go
Severity
HIGH
ID
GHSA-xvg2-cgv6-6h7v

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…