CVE-2026-40293: OpenFGA Unauthenticated Playground Endpoint Discloses Preshared Vulnerability

MODERATE
Advisory Identifier: GHSA-68m9-983m-f3v5
Share
CVSS 6.5
CWE-200
Published
Advisory Summary

CVE-2026-40293 is a MODERATE (CVSS 6.5) unauthenticated playground endpoint discloses preshared vulnerability (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) affecting OpenFGA libraries in the Go ecosystem. The issue involves unauthenticated playground endpoint discloses preshared api key in html response. Remediation is available by upgrading affected packages to version 1.14.0.

CVE-2026-40293 at a Glance

CVE Identifier CVE-2026-40293
GHSA Identifier GHSA-68m9-983m-f3v5
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Affected Product OpenFGA
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2026-40293

To remediate this vulnerability, upgrade all affected OpenFGA dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/openfga/openfga fixed: 1.14.0 
Upgrade github.com/openfga/openfga to 1.14.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/openfga/openfga

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-40293, inspect your project dependencies for OpenFGA:

inspect dependencies for github.com/openfga/openfga

Analyze the terminal output to locate any version of OpenFGA in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.14.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor, where the product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. In OpenFGA, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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.`

CVE-2026-40293 Affected OpenFGA Versions

1 component(s)
Fixed Versions:
1.14.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/openfga/openfga
golang/github.com/openfga/openfga
Go
≥ 0.1.4
< 1.14.0
1.14.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openfga/openfga/security/advisories/GHSA-68m9-983m-f3v5
NVD — CVE-2026-40293 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-40293
OpenFGA Source Repository REPOSITORY
https://github.com/openfga/openfga
OpenFGA Release RELEASE
https://github.com/openfga/openfga/releases/tag/v1.14.0

Frequently Asked Questions

What is CVE-2026-40293?
CVE-2026-40293 is a security vulnerability in OpenFGA involving Unauthenticated playground endpoint discloses preshared API key in HTML response under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor.
Which OpenFGA versions are affected?
Affected versions include releases prior to 1.14.0 across affected packages: github.com/openfga/openfga.
What version fixes CVE-2026-40293?
Upgrading to 1.14.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/openfga/openfga affected?
Yes, github.com/openfga/openfga is affected in releases prior to 1.14.0. Upgrade your dependency to 1.14.0 or later.
What is the CVSS score of CVE-2026-40293?
CVE-2026-40293 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2026-40293?
CVE-2026-40293 is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.).
How can I check Go dependencies for CVE-2026-40293?
Run the dependency tree command: 'inspect dependencies for github.com/openfga/openfga'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-68m9-983m-f3v5",
  "modified" : "2026-04-24T20:48:25Z",
  "published" : "2026-04-08T21:51:41Z",
  "aliases" : [ "CVE-2026-40293" ],
  "summary" : "OpenFGA: Unauthenticated playground endpoint discloses preshared API key in HTML response",
  "details" : "### Description\nWhen 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.\n\n\n### Am I Affected?\nYou are affected if you meet each of the following preconditions:\n* You are running OpenFGA with --authn-method preshared, and\n* The playground is enabled, and\n* The playground endpoint is accessible beyond localhost or trusted networks.\n\n### Fix\nUpgrade to OpenFGA v1.14.0, or disable the playground by running `./openfga run --playground-enabled=false.`",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/openfga/openfga"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.4"
      }, {
        "fixed" : "1.14.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 1.13.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openfga/openfga/security/advisories/GHSA-68m9-983m-f3v5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-40293"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openfga/openfga"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openfga/openfga/releases/tag/v1.14.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-04-08T21:51:41Z",
    "nvd_published_at" : "2026-04-17T21:16:34Z"
  }
}