OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset (CVE-2026-55689) | HOL Guard CVE

Medium · CVSS 6.8CVE-2026-55689GHSA-HCXC-WF8J-23HV

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

Answer in brief

CVE-2026-55689 records a Medium severity (CVSS 6.8) vulnerability in OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset. The current sources do not mark it as known exploited. The current feed maps openfga/openfga (generic), github.com/openfga/openfga (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 9, 2026Updated Jul 14, 2026Source checked Sep 16, 2026First seen by HOL Jun 19, 2026Material review Jul 14, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 6.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps openfga/openfga (generic), github.com/openfga/openfga (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
openfga/openfgageneric	< 1.18.0	Not reported
github.com/openfga/openfgago	<=1.17.1	1.18.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for openfga/openfga, github.com/openfga/openfga.
Review the reported fix. Update github.com/openfga/openfga to 1.18.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Jul 14, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jun 19, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.