High severity · published Jul 9, 2026
CVE-2026-55689
OpenFGA: OIDC audience validation skipped when --authn-oidc-audience is unset
8.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openfga · openfga
< 1.18.0 · source: vendor, NVD
HC
Helm Charts · Openfga
before 0.3.9 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-55689
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-55689
Broken Link
https://github.com/openfga/helm-ch
Product
https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9
Patch
https://github.com/openfga/openfga/commit/44596773b2e62738720ef215bf7fa04352954271
Product
https://github.com/openfga/openfga/releases/tag/v1.18.0
Vendor Advisory
https://github.com/openfga/openfga/security/advisories/GHSA-hcxc-wf8j-23hv
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