GHSA-68m9-983m-f3v5 CVE-2026-40293 GO-2026-5170
OpenFGA: Unauthenticated playground endpoint discloses preshared API key in HTML response
- Severity
- 6.5 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 0.29%
- Chance of exploitation in the next 30 days. Higher than 21.23% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
- Fix
1.14.0- Upgrade github.com/openfga/openfga to this version or later
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.
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| github.com/openfga/openfga | >= 0.1.4, < 1.14.0 |
1.14.0 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
github.com/openfga/openfga Go → 1.14.0
- go
go get github.com/openfga/openfga@v1.14.0 && go mod tidy
Severity breakdown
CVSS 3.1 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Weakness
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 to prevent it
- Architecture and Design: Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References
Advisories
Packages
Other links
- github.com/openfga/openfga/security/advisories/GHSA-68m9-983m-f3v5
- github.com/openfga/openfga/releases/tag/v1.14.0
- access.redhat.com/errata/RHSA-2026:24503
- access.redhat.com/errata/RHSA-2026:24539
- access.redhat.com/errata/RHSA-2026:36882
- access.redhat.com/security/cve/CVE-2026-40293
- bugzilla.redhat.com/show_bug.cgi
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40293.json
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-g3pg-frfm-pr2m OpenFGA: ListUsers returns a deliberately-excluded user when a `but not` exclusion under a type-bound wildcard is intersected (`and`) with another relation that also grants that user | Medium | Also affects github.com/openfga/openfga |
| GHSA-hcxc-wf8j-23hv OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset | High | Also affects github.com/openfga/openfga |
| GHSA-cf98-j28v-49v6 OpenFGA Improper Policy Enforcement | Medium | Also affects github.com/openfga/openfga |
| GHSA-8396-jffm-qx4w OpenFGA has cache-key delimiter injection in shared-iterator and v2 iterator that caches enables intra-store authorization-decision poisoning | Medium | Also affects github.com/openfga/openfga |
| GHSA-57j5-qwp2-vqp6 OpenFGA has Improper Policy Enforcement | Medium | Also affects github.com/openfga/openfga |
| GHSA-jwvj-g8pc-cx45 OpenFGA's BatchCheck within-request deduplication produces incorrect authorization decisions via list-value cache-key collision | High | Also affects github.com/openfga/openfga |
| GHSA-h6c8-cww8-35hf OpenFGA has an Authorization Bypass through cached keys | Critical | Also affects github.com/openfga/openfga |
| GHSA-jq9f-gm9w-rwm9 OpenFGA Improper Policy Enforcement | High | Also affects github.com/openfga/openfga |
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