Vulnerability · Published Jul 9, 2026 · Assigned by GitHub_M
CVE-2026-55689OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset
Medium 6.8
In plain English
A medium-severity improper authentication in openfga from openfga. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/openfga/openfga | 1.18.0 | GHSA-hcxc-wf8j-23hv |
| Go | github.com/openfga/openfga | 1.18.0 | GO-2026-5423 |
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv x_refsource_CONFIRM
- https://github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271 x_refsource_MISC
- https://github.com/openfga/helm-ch x_refsource_MISC
- https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9 x_refsource_MISC
- https://github.com/openfga/openfga/releases/tag/v1.18.0 x_refsource_MISC