What is CVE-2022-39304?

CVE-2022-39304 is a medium-severity security vulnerability in github.com/bradleyfalzon/ghinstallation (go), affecting versions < 2.0.0. It is fixed in 2.0.0.

How severe is CVE-2022-39304?

CVE-2022-39304 has a CVSS score of 5.0 (Medium). 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 github.com/bradleyfalzon/ghinstallation are affected by CVE-2022-39304?

github.com/bradleyfalzon/ghinstallation (go) versions < 2.0.0 is affected.

Is there a fix for CVE-2022-39304?

Yes. CVE-2022-39304 is fixed in 2.0.0. Upgrade to this version or later.

Is CVE-2022-39304 exploitable, and should I be worried?

Whether CVE-2022-39304 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 CVE-2022-39304 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 CVE-2022-39304?

Upgrade github.com/bradleyfalzon/ghinstallation to 2.0.0 or later.

CVE-2022-39304

Q: How severe is CVE-2022-39304?

CVE-2022-39304 has a CVSS score of 5.0 (Medium). 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 github.com/bradleyfalzon/ghinstallation are affected by CVE-2022-39304?

github.com/bradleyfalzon/ghinstallation (go) versions < 2.0.0 is affected.

Q: Is there a fix for CVE-2022-39304?

Yes. CVE-2022-39304 is fixed in 2.0.0. Upgrade to this version or later.

Q: Is CVE-2022-39304 exploitable, and should I be worried?

Whether CVE-2022-39304 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 CVE-2022-39304 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 CVE-2022-39304?

Upgrade github.com/bradleyfalzon/ghinstallation to 2.0.0 or later.

Summary

ghinstallation returns app JWT in error responses

References

Are there any links users can visit to find out more?

See https://docs.github.com/en/developers/apps/building-github-apps/authenticating-with-github-apps#authenticating-as-an-installation for the App installation flow.

For more information

If you have any questions or comments about this advisory:

Open an issue in ghinstallation

Impact

In ghinstallation v1, when the request to refresh an installation token failed, the HTTP request and response would be returned for debugging.

https://github.com/bradleyfalzon/ghinstallation/blob/24e56b3fb7669f209134a01eff731d7e2ef72a5c/transport.go#L172-L174

The request contained the bearer JWT for the App, and was returned back to clients. This token is short lived (10 minute maximum).

CVE-2022-39304 has a CVSS score of 5.0 (Medium). The vector is requires local access, low privileges required, and user interaction required. 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 (2.0.0); upgrading removes the vulnerable code path.

Affected versions

github.com/bradleyfalzon/ghinstallation (< 2.0.0)

Security releases

github.com/bradleyfalzon/ghinstallation → 2.0.0 (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.

Already deployed Kodem?

See it in your environment New to Kodem? Get a demo →

Remediation advice

This has already been patched in d24f14f8be70d94129d76026e8b0f4f9170c8c3e, and is available in releases >= v2.0.0.

Frequently Asked Questions

What is CVE-2022-39304? CVE-2022-39304 is a medium-severity security vulnerability in github.com/bradleyfalzon/ghinstallation (go), affecting versions < 2.0.0. It is fixed in 2.0.0.
How severe is CVE-2022-39304? CVE-2022-39304 has a CVSS score of 5.0 (Medium). 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 github.com/bradleyfalzon/ghinstallation are affected by CVE-2022-39304? github.com/bradleyfalzon/ghinstallation (go) versions < 2.0.0 is affected.
Is there a fix for CVE-2022-39304? Yes. CVE-2022-39304 is fixed in 2.0.0. Upgrade to this version or later.
Is CVE-2022-39304 exploitable, and should I be worried? Whether CVE-2022-39304 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 CVE-2022-39304 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 CVE-2022-39304? Upgrade github.com/bradleyfalzon/ghinstallation to 2.0.0 or later.