What is GHSA-M425-MQ94-257G?

GHSA-M425-MQ94-257G is a high-severity security vulnerability in google.golang.org/grpc (go), affecting versions < 1.56.3. It is fixed in 1.56.3, 1.57.1, 1.58.3.

How severe is GHSA-M425-MQ94-257G?

GHSA-M425-MQ94-257G has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of google.golang.org/grpc are affected by GHSA-M425-MQ94-257G?

google.golang.org/grpc (go) versions < 1.56.3 is affected.

Is there a fix for GHSA-M425-MQ94-257G?

Yes. GHSA-M425-MQ94-257G is fixed in 1.56.3, 1.57.1, 1.58.3. Upgrade to this version or later.

Is GHSA-M425-MQ94-257G exploitable, and should I be worried?

Whether GHSA-M425-MQ94-257G 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-M425-MQ94-257G 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-M425-MQ94-257G?

Upgrade: google.golang.org/grpc to 1.56.3 or later, google.golang.org/grpc to 1.57.1 or later, google.golang.org/grpc to 1.58.3 or later.

GHSA-M425-MQ94-257G in google.golang.org/grpc

Q: How severe is GHSA-M425-MQ94-257G?

GHSA-M425-MQ94-257G has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of google.golang.org/grpc are affected by GHSA-M425-MQ94-257G?

google.golang.org/grpc (go) versions < 1.56.3 is affected.

Q: Is there a fix for GHSA-M425-MQ94-257G?

Yes. GHSA-M425-MQ94-257G is fixed in 1.56.3, 1.57.1, 1.58.3. Upgrade to this version or later.

Q: Is GHSA-M425-MQ94-257G exploitable, and should I be worried?

Whether GHSA-M425-MQ94-257G 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-M425-MQ94-257G 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-M425-MQ94-257G?

Upgrade: google.golang.org/grpc to 1.56.3 or later, google.golang.org/grpc to 1.57.1 or later, google.golang.org/grpc to 1.58.3 or later.

Summary

gRPC-Go HTTP/2 Rapid Reset vulnerability

Workarounds

None.

References

#6703

Impact

In affected releases of gRPC-Go, it is possible for an attacker to send HTTP/2 requests, cancel them, and send subsequent requests, which is valid by the HTTP/2 protocol, but would cause the gRPC-Go server to launch more concurrent method handlers than the configured maximum stream limit.

GHSA-M425-MQ94-257G has a CVSS score of 7.5 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.56.3, 1.57.1, 1.58.3); upgrading removes the vulnerable code path.

Affected versions

google.golang.org/grpc (< 1.56.3) google.golang.org/grpc (>= 1.57.0, < 1.57.1) google.golang.org/grpc (>= 1.58.0, < 1.58.3)

Security releases

google.golang.org/grpc → 1.56.3 (go) google.golang.org/grpc → 1.57.1 (go) google.golang.org/grpc → 1.58.3 (go)

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

This vulnerability was addressed by #6703 and has been included in patch releases: 1.56.3, 1.57.1, 1.58.3. It is also included in the latest release, 1.59.0.

Along with applying the patch, users should also ensure they are using the grpc.MaxConcurrentStreams server option to apply a limit to the server's resources used for any single connection.

Frequently Asked Questions

What is GHSA-M425-MQ94-257G? GHSA-M425-MQ94-257G is a high-severity security vulnerability in google.golang.org/grpc (go), affecting versions < 1.56.3. It is fixed in 1.56.3, 1.57.1, 1.58.3.
How severe is GHSA-M425-MQ94-257G? GHSA-M425-MQ94-257G has a CVSS score of 7.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of google.golang.org/grpc are affected by GHSA-M425-MQ94-257G? google.golang.org/grpc (go) versions < 1.56.3 is affected.
Is there a fix for GHSA-M425-MQ94-257G? Yes. GHSA-M425-MQ94-257G is fixed in 1.56.3, 1.57.1, 1.58.3. Upgrade to this version or later.
Is GHSA-M425-MQ94-257G exploitable, and should I be worried? Whether GHSA-M425-MQ94-257G 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-M425-MQ94-257G 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-M425-MQ94-257G?
- Upgrade google.golang.org/grpc to 1.56.3 or later
- Upgrade google.golang.org/grpc to 1.57.1 or later
- Upgrade google.golang.org/grpc to 1.58.3 or later