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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (32.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Openfga Helm Charts
- Openfga — versions < 1.18.0
Weakness classification (CWE)
References
- github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv (Vendor Advisory)
- github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271 (Patch)
- github.com/openfga/helm-ch (Broken Link)
- github.com/openfga/helm-charts/releases/tag/openfga-0.3.9 (Product, Release Notes)
- github.com/openfga/openfga/releases/tag/v1.18.0 (Product, Release Notes)
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.