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Fencer Intel
medium —

GHSA-84g5-x8j3-7235 json

Netfoil has incorrect allowlist enforcement

published 6mo ago modified 4mo ago also GO-2026-5240

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

### Summary Rules could be bypassed by changing the first character: `example.com` could be be bypassed by e.g. `fxample.com`.

### Details Off-by-one error in the suffixtrie implementation.

### Impact The domain filter could be bypassed. Please note that DNS filtering alone is not enough to block malicious traffic.

Patch / fix

  • go github.com/tinfoil-factory/netfoil 0.2.1

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Affected packages

ecosystem package affected fixed in
go github.com/tinfoil-factory/netfoil
<0.2.1
0.2.1

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.