How severe is GHSA-7856-g3gv-9wq8?

No CVSS score has been assigned to GHSA-7856-g3gv-9wq8 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-7856-g3gv-9wq8?

GHSA-7856-g3gv-9wq8 affects the following packages: github.com/tinfoil-factory/netfoil (Go). Ecosystems affected: Go.

How do I fix GHSA-7856-g3gv-9wq8?

Update github.com/tinfoil-factory/netfoil to 0.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7856-g3gv-9wq8 is resolved across your whole dependency graph.

How do I detect GHSA-7856-g3gv-9wq8 in my Go dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/tinfoil-factory/netfoil, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-7856-g3gv-9wq8 if there is no patch (or I can't update yet)?

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.

Is GHSA-7856-g3gv-9wq8 actively exploited in the wild?

No public exploit code has been indexed for GHSA-7856-g3gv-9wq8 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

When was GHSA-7856-g3gv-9wq8 published, and has it been updated?

GHSA-7856-g3gv-9wq8 was published on July 7, 2026 and was last updated on July 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹 Go

Not in CISA KEV

netfoil: Attacker controlled data written to logsGHSA-7856-g3gv-9wq8

GHSA-7856-g3gv-9wq8 is a security vulnerability in github.com/tinfoil-factory/netfoil. A fix is available for github.com/tinfoil-factory/netfoil — see the affected versions and patch details below.

Also known asGO-2026-5935

Published

Jul 7, 2026

Updated

Jul 21, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Jul 21, 2026 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

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

Domain names were written to the log without first being validated to contain allowed characters.

Impact

Depends on how the logs were used.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/tinfoil-factory/netfoil`	all versions	0.3.0`go get github.com/tinfoil-factory/netfoil@v0.3.0`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/tinfoil-factory/netfoil, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/tinfoil-factory/netfoil to 0.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7856-g3gv-9wq8 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.

Frequently Asked Questions

### Summary Domain names were written to the log without first being validated to contain allowed characters. ### Impact Depends on how the logs were used.

O3 Security · Impact-Aware SCA

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