Summary
Netfoil has incorrect allowlist enforcement
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.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is GHSA-84G5-X8J3-7235? GHSA-84G5-X8J3-7235 is a medium-severity security vulnerability in github.com/tinfoil-factory/netfoil (go), affecting versions < 0.2.1. It is fixed in 0.2.1.
- Which versions of github.com/tinfoil-factory/netfoil are affected by GHSA-84G5-X8J3-7235? github.com/tinfoil-factory/netfoil (go) versions < 0.2.1 is affected.
- Is there a fix for GHSA-84G5-X8J3-7235? Yes. GHSA-84G5-X8J3-7235 is fixed in 0.2.1. Upgrade to this version or later.
- Is GHSA-84G5-X8J3-7235 exploitable, and should I be worried? Whether GHSA-84G5-X8J3-7235 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-84G5-X8J3-7235 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-84G5-X8J3-7235? Upgrade
github.com/tinfoil-factory/netfoilto 0.2.1 or later.