CVE-2026-55689
Medium
Description
OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, OpenFGA's OIDC authenticator skipped JWT audience validation when authn.method was set to oidc, authn.oidc.issuer was configured, and authn.oidc.audience was not set, allowing a token minted for an unrelated service by the same identity provider to authenticate to OpenFGA. This issue is fixed in 1.18.0.
SeverityMedium
CVSS6.8
Exploit probability—
ProductOpenfga
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- openfga openfga1.18.0 or later
- openfga helm_charts0.3.9 or later
- github.com/openfga/openfga1.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openfga openfga | v < 1.18.0 | 1.18.0 |
| openfga helm_charts | v < 0.3.9 | 0.3.9 |
| github.com/openfga/openfgaGo | v < 1.18.0 | 1.18.0 |
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