What is GHSA-4H96-MV53-2C86?

GHSA-4H96-MV53-2C86 is a medium-severity improper input validation vulnerability in fast_id_map (rust), affecting versions <= 0.1.0. No fixed version is listed yet. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.

Which versions of fast_id_map are affected by GHSA-4H96-MV53-2C86?

fast_id_map (rust) versions <= 0.1.0 is affected.

Is there a fix for GHSA-4H96-MV53-2C86?

No fixed version is listed for GHSA-4H96-MV53-2C86 yet. Monitor the advisory for updates and apply mitigations in the interim.

Is GHSA-4H96-MV53-2C86 exploitable, and should I be worried?

Whether GHSA-4H96-MV53-2C86 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.

What actually determines whether GHSA-4H96-MV53-2C86 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.

GHSA-4H96-MV53-2C86 in fast_id_map

Q: Which versions of fast_id_map are affected by GHSA-4H96-MV53-2C86?

fast_id_map (rust) versions <= 0.1.0 is affected.

Q: Is there a fix for GHSA-4H96-MV53-2C86?

No fixed version is listed for GHSA-4H96-MV53-2C86 yet. Monitor the advisory for updates and apply mitigations in the interim.

Q: Is GHSA-4H96-MV53-2C86 exploitable, and should I be worried?

Whether GHSA-4H96-MV53-2C86 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.

Q: What actually determines whether GHSA-4H96-MV53-2C86 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.

Q: How do I fix GHSA-4H96-MV53-2C86?

No fixed version is listed yet. In the interim: Validate all external input against an allowlist of expected values, types, and ranges before processing.

Summary

fastidmap has a soundness issue and is unmaintained

FastMap::get() lacks sufficient checks to its parameter index and is used to unsafely get a Vec element.

fast_id_map is unmaintained.

Impact

The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths. Typical impact: varies by context: data corruption, logic bypass, or denial of service.

Affected versions

fast_id_map (<= 0.1.0)

Security releases

Not available

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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Remediation advice

No fixed version is listed for GHSA-4H96-MV53-2C86 yet.

In the interim: Validate all external input against an allowlist of expected values, types, and ranges before processing.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is GHSA-4H96-MV53-2C86? GHSA-4H96-MV53-2C86 is a medium-severity improper input validation vulnerability in fast_id_map (rust), affecting versions <= 0.1.0. No fixed version is listed yet. The application does not adequately validate input before processing it, allowing unexpected values to reach sensitive code paths.
Which versions of fast_id_map are affected by GHSA-4H96-MV53-2C86? fast_id_map (rust) versions <= 0.1.0 is affected.
Is there a fix for GHSA-4H96-MV53-2C86? No fixed version is listed for GHSA-4H96-MV53-2C86 yet. Monitor the advisory for updates and apply mitigations in the interim.
Is GHSA-4H96-MV53-2C86 exploitable, and should I be worried? Whether GHSA-4H96-MV53-2C86 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-4H96-MV53-2C86 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-4H96-MV53-2C86? No fixed version is listed yet. In the interim: Validate all external input against an allowlist of expected values, types, and ranges before processing.