getkin/kin-openapi Authentication Bypass Vulnerability: Early Warning
- Severity
- HIGH
- Affected component
- getkin/kin-openapi (go)
- Patched version
- Not yet available
An early warning has been issued for a high-severity vulnerability in the getkin/kin-openapi package, which may allow unauthenticated requests to bypass security requirements.
What happened
An early warning has been issued for a critical vulnerability in the getkin/kin-openapi package. This package, when used with a nil AuthenticationFunc, reportedly replaces it with a NoopAuthenticationFunc. This behavior allows unauthenticated requests to bypass security requirements, potentially leading to unauthorized access. The vulnerability is tracked under GHSA-R277-6W6Q-XMQW and has been classified as a critical CVE. No authoritative version range has been published yet, and the vulnerability has not been exploited in the wild.
The vulnerability lies in the ValidationHandler.Load() method, which fails to enforce authentication when a nil AuthenticationFunc is provided. Instead, it defaults to a NoopAuthenticationFunc, which does not perform any authentication checks. This fail-open behavior can be exploited to allow unauthorized access to protected resources.
What to do about it
- Check your dependencies for the getkin/kin-openapi package and identify which version you are using.
- Upgrade to a version of getkin/kin-openapi that fixes the authentication bypass issue, once an official fix is published.
- Monitor the primary sources for updates on the vulnerability and any available patches.
- Implement additional security measures to detect and prevent unauthorized access, such as logging and monitoring authentication attempts.
How 0Day would have caught this
getkin/kin-openapi is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.
Frequently asked questions
Am I affected?
If your project depends on the getkin/kin-openapi package, you may be affected. Check your dependencies and consult the primary sources for more information.
What should I do right now?
Monitor the primary sources for updates on the vulnerability and any available patches. Once a fix is published, upgrade to the fixed version of getkin/kin-openapi.
Is there an official fix available yet?
No official fix has been published yet. Monitor the primary sources for updates.