CVE-2026-40293
OpenFGA: Unauthenticated playground endpoint discloses preshared API key in HTML response
Description
### Description 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. ### Am I Affected? You are affected if you meet each of the following preconditions: * You are running OpenFGA with --authn-method preshared, and * The playground is enabled, and * The playground endpoint is accessible beyond localhost or trusted networks. ### Fix Upgrade to OpenFGA v1.14.0, or disable the playground by running `./openfga run --playground-enabled=false.`
How to fix CVE-2026-40293
To remediate CVE-2026-40293, upgrade the affected package to a fixed version below.
- —upgrade to 1.14.0 or later
Is CVE-2026-40293 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 0.1.4, < 1.14.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |