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MEDIUM severity

CVE-2026-40293 — openfga

MEDIUM

CVE-2026-40293 is a medium-severity (CVSS 6.5) Information Exposure vulnerability in github.com/openfga/openfga. A fix is available for github.com/openfga/openfga — see the affected versions and patch details below.

OpenFGA Playground Preshared Key Exposure

Also known asGHSA-68m9-983m-f3v5GO-2026-5170
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-40293.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs21th percentile — riskier than 21% of all scored CVEsHighest risk
0.00%0.33%0.67%1.00%0.1%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐹github.com/openfga/openfga

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

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.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/openfga/openfga≥ 0.1.4&&< 1.14.01.14.0go get github.com/openfga/openfga@v1.14.0

Affected Products

1 product · 1 configurations
Application
openfgaopenfga
≥ 0.1.4 && < 1.14.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/openfga/openfga, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update github.com/openfga/openfga to 1.14.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-40293 is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatImportant

This is an Important information disclosure flaw in OpenFGA, an authorization engine used in Red Hat products. The vulnerability occurs when OpenFGA is configured with preshared-key authentication and its built-in playground is enabled and exposed beyond localhost or trusted networks. The /playground endpoint,…

ProductFixed inAdvisory
Multicluster Global Hub 1.7.3multicluster-globalhub/multicluster-globalhub-grafana-rhel9:1779925273RHSA-2026:24503
Red Hat Advanced Cluster Management for Kubernetes 2.14rhacm2/acm-grafana-rhel9:1782693386RHSA-2026:36882
Red Hat Advanced Cluster Management for Kubernetes 2.15rhacm2/acm-grafana-rhel9:1780677003RHSA-2026:24539

Frequently Asked Questions

### 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 p
O3 Security · Impact-Aware SCA

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CVE-2026-40293: openfga — Fixed in 1.14.0