Authentication bypass via omitted JWT audience validation
Published Jul 9, 2026 · Updated Jul 9, 2026
Improper authentication in OpenFGA before 1.18.0 allows remote authenticated users to access the service with mis-scoped JWTs. The OIDC authenticator omitted jwt.WithAudience when authn.oidc.audience was empty, so it accepted validly signed tokens from the configured issuer regardless of audience. Exploitation requires OIDC mode, a configured issuer with no audience, and an attacker-held token for another service from that identity provider.
Summary
What happened
Improper authentication in OpenFGA before 1.18.0 allows remote authenticated users to access the service with mis-scoped JWTs. The OIDC authenticator omitted jwt.WithAudience when authn.oidc.audience was empty, so it accepted validly signed tokens from the configured issuer regardless of audience. Exploitation requires OIDC mode, a configured issuer with no audience, and an attacker-held token for another service from that identity provider.
The record
- CVE
- CVE-2026-55689
- Published
- Jul 9, 2026
- Updated
- Jul 9, 2026
- Vendor
- OpenFGA
- Product
- OpenFGA
- Classifications
- CWE-287, T1550.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 9, 2026CVE publishedPublication date reported by the CVE source.
- Jul 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.18.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo