CVE-2026-40293: OpenFGA: Unauthenticated playground endpoint discloses preshared API key in HTML response

April 8, 2026 (updated April 24, 2026)

When OpenFGA is configured to use preshared-key authentication with the built-in playground enabled, the local server includes the preshared API key in the HTML response of the /playground endpoint. The /playground endpoint is enabled by default and does not require authentication. It is intended for local development and debugging and is not designed to be exposed to production environments.

References

github.com/advisories/GHSA-68m9-983m-f3v5
github.com/openfga/openfga/releases/tag/v1.14.0
github.com/openfga/openfga/security/advisories/GHSA-68m9-983m-f3v5
nvd.nist.gov/vuln/detail/CVE-2026-40293

Code Behaviors & Features

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