CVE-2026-40293 OpenFGA Playground Preshared Key Exposure
Attackers can read the preshared API key from the playground endpoint if exposed, allowing unauthorized access to the authorization service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40293?
CVE-2026-40293 is a medium-severity vulnerability in openfga, published on 17 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenFGA is an authorization/permission engine built for developers. In versions 0.1.4 through 1.13.1, 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. Only those who run OpenFGA with `--authn-method` preshared, with the playground enabled, and with the playground endpoint accessible beyond localhost or trusted networks are vulnerable. To remediate the issue, users should upgrade to OpenFGA v1.14.0, or disable the playground by running `./openfga run --playground-enabled=false.`
Which versions are affected by CVE-2026-40293?
3 open source packages ship an affected version, including github.com/openfga/openfga. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/openfga/openfga Go | From 0.1.4 | 1.14.0 |
github.com/openfga/openfga Go | From 0.1.4 | 1.14.0 |
github.com/openfga/openfga Go | From 0.1.4 | 1.14.0 |
Products include Openfga Openfga.
How do I fix CVE-2026-40293?
Upgrade github.com/openfga/openfga to 1.14.0 or later.
Is CVE-2026-40293 being exploited?
There is no known exploitation of CVE-2026-40293 in the wild and no public exploit code.
Other vulnerabilities in openfga
Sources
Also known as CLEANSTART-2026-CB09897, GHSA-68m9-983m-f3v5, GO-2026-5170, MINI-29f3-pwmh-57q9, MINI-3fj4-pj3g-fg3m, MINI-4842-93m8-pm74 and 15 more.