netfoil has a domain name filter bypass via multiple questions

published 2026-07-07 4mo ago modified 2026-07-21 3mo ago also GO-2026-5934

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 Potential bypass of domain name filter by crafting a DNS request with multiple questions, with the first question being legitimate.

### Impact Depends on a local attackers ability to craft multiple questions and the remote DoH server supporting them.

Patch / fix

fixed in 1

go github.com/tinfoil-factory/netfoil 0.3.0

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Affected packages

ecosystem	package	affected	fixed in
go	github.com/tinfoil-factory/netfoil	<0.3.0	0.3.0

Classification

Weakness

CWE-436 Interpretation Conflict
CWE-693 Protection Mechanism Failure

References

github.com /tinfoil-factory/netfoil/security/advisories/GHSA-59qp-cfj3-rp64
web, advisory
github.com /tinfoil-factory/netfoil
package

Sources

GitHub Advisory GHSA-59qp-cfj3-rp64
OSV GO-2026-5934

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