Which versions of maxminddb are affected by GHSA-MJ73-J457-8X9Q?

maxminddb (rust) versions >= 0.11.0, < 0.27.0 is affected.

Is there a fix for GHSA-MJ73-J457-8X9Q?

Yes. GHSA-MJ73-J457-8X9Q is fixed in 0.27.0. Upgrade to this version or later.

Is GHSA-MJ73-J457-8X9Q exploitable, and should I be worried?

Whether GHSA-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q in maxminddb

Q: What is GHSA-MJ73-J457-8X9Q?

GHSA-MJ73-J457-8X9Q is a low-severity security vulnerability in maxminddb (rust), affecting versions >= 0.11.0, < 0.27.0. It is fixed in 0.27.0.

Q: Is there a fix for GHSA-MJ73-J457-8X9Q?

Yes. GHSA-MJ73-J457-8X9Q is fixed in 0.27.0. Upgrade to this version or later.

Q: Is GHSA-MJ73-J457-8X9Q exploitable, and should I be worried?

Whether GHSA-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q?

Upgrade maxminddb to 0.27.0 or later.

GHSA-MJ73-J457-8X9Q

GHSA-MJ73-J457-8X9Q is a low-severity security vulnerability in maxminddb (rust), affecting versions >= 0.11.0, < 0.27.0. It is fixed in 0.27.0.

Does this CVE actually affect you?

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Runtime intelligence, not another scanner.

Summary

maxminddb's Reader::open_mmap unsoundly marks unsafe memmap operation as safe

maxminddb prior to version 0.27 declared Reader::open_mmap as safe despite wrapping an inherently unsafe memmap2 operation with no extra step done to guarantee safety. This could have led to undefined behaviour if the file were to be modified on disk while the memory map was still active.

Impact

Affected versions

maxminddb (>= 0.11.0, < 0.27.0)

Security releases

maxminddb → 0.27.0 (rust)

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

Upgrade maxminddb to 0.27.0 or later to resolve this vulnerability.

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

Frequently Asked Questions

What is GHSA-MJ73-J457-8X9Q? GHSA-MJ73-J457-8X9Q is a low-severity security vulnerability in maxminddb (rust), affecting versions >= 0.11.0, < 0.27.0. It is fixed in 0.27.0.
Which versions of maxminddb are affected by GHSA-MJ73-J457-8X9Q? maxminddb (rust) versions >= 0.11.0, < 0.27.0 is affected.
Is there a fix for GHSA-MJ73-J457-8X9Q? Yes. GHSA-MJ73-J457-8X9Q is fixed in 0.27.0. Upgrade to this version or later.
Is GHSA-MJ73-J457-8X9Q exploitable, and should I be worried? Whether GHSA-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q 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-MJ73-J457-8X9Q? Upgrade maxminddb to 0.27.0 or later.