What’s Vulnerable › Vulnerabilities

CVE-2026-55689: OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-07-14
• Weakness: CWE-287

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 products

• openfga Helm Charts: before 0.3.9 — fixed in 0.3.9
• openfga: before 1.18.0 — fixed in 1.18.0

How to fix

Upgrade to a fixed version: openfga Helm Charts 0.3.9; openfga 1.18.0. Check the vendor advisory for mitigations.

References

• https://github.com/openfga/helm-ch
• https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9
• https://github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271
• https://github.com/openfga/openfga/releases/tag/v1.18.0
• https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv

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