Auth bypass in Openfga Helm Charts

CVE-2026-55689

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.

Vulnerability class: Broken Authentication

EPSS: 0.003 (22.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-55689?
CVE-2026-55689 is a medium-severity vulnerability in Openfga Helm Charts, classified under Improper Authentication. CVSS score: 6.8/10. Published 2026-07-09.
How severe is CVE-2026-55689?
Medium severity. CVSS v3 base score is 6.8 out of 10.