Which versions of mail-internals are affected by GHSA-RCX8-48PC-V9Q8?

mail-internals (rust) versions >= 0.2.0, <= 0.2.3 is affected.

Is there a fix for GHSA-RCX8-48PC-V9Q8?

No fixed version is listed for GHSA-RCX8-48PC-V9Q8 yet. Monitor the advisory for updates and apply mitigations in the interim.

Is GHSA-RCX8-48PC-V9Q8 exploitable, and should I be worried?

Whether GHSA-RCX8-48PC-V9Q8 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-RCX8-48PC-V9Q8 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-RCX8-48PC-V9Q8 in mail-internals

Q: What is GHSA-RCX8-48PC-V9Q8?

GHSA-RCX8-48PC-V9Q8 is a medium-severity security vulnerability in mail-internals (rust), affecting versions >= 0.2.0, <= 0.2.3. No fixed version is listed yet.

Q: Is there a fix for GHSA-RCX8-48PC-V9Q8?

No fixed version is listed for GHSA-RCX8-48PC-V9Q8 yet. Monitor the advisory for updates and apply mitigations in the interim.

Q: Is GHSA-RCX8-48PC-V9Q8 exploitable, and should I be worried?

Whether GHSA-RCX8-48PC-V9Q8 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-RCX8-48PC-V9Q8 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-RCX8-48PC-V9Q8

GHSA-RCX8-48PC-V9Q8 is a medium-severity security vulnerability in mail-internals (rust), affecting versions >= 0.2.0, <= 0.2.3. No fixed version is listed yet.

Does this CVE actually affect you?

Kodem shows which CVEs are reachable and running in your applications, so you fix what's exploitable, not just what's listed.

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Runtime intelligence, not another scanner.

Summary

mail-internals use-after-free vulnerability in vecinsertbytes

Incorrect reallocation logic in the function vec_insert_bytes causes a use-after-free.

This function does not have to be called directly to trigger the vulnerability because many methods on EncodingWriter call this function internally.

The mail-* suite is unmaintained and the upstream sources have been actively vandalised.
A fixed mail-internals-ng (and mail-headers-ng and mail-core-ng) crate has been published which fixes this, and a dependency on another unsound crate.

Impact

Affected versions

mail-internals (>= 0.2.0, <= 0.2.3)

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-RCX8-48PC-V9Q8 yet.

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

Frequently Asked Questions

What is GHSA-RCX8-48PC-V9Q8? GHSA-RCX8-48PC-V9Q8 is a medium-severity security vulnerability in mail-internals (rust), affecting versions >= 0.2.0, <= 0.2.3. No fixed version is listed yet.
Which versions of mail-internals are affected by GHSA-RCX8-48PC-V9Q8? mail-internals (rust) versions >= 0.2.0, <= 0.2.3 is affected.
Is there a fix for GHSA-RCX8-48PC-V9Q8? No fixed version is listed for GHSA-RCX8-48PC-V9Q8 yet. Monitor the advisory for updates and apply mitigations in the interim.
Is GHSA-RCX8-48PC-V9Q8 exploitable, and should I be worried? Whether GHSA-RCX8-48PC-V9Q8 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-RCX8-48PC-V9Q8 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.