What’s Vulnerable › Vulnerabilities

CVE-2023-35933: OpenFGA denial of service die to circular relationship

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-06-26 · updated 2026-06-17
• Weakness: CWE-835

Description

OPenFGA is an open source authorization/permission engine built for developers. OpenFGA versions v1.1.0 and prior are vulnerable to a DoS attack when Check and ListObjects calls are executed against authorization models that contain circular relationship definitions. Users are affected by this vulnerability if they are using OpenFGA v1.1.0 or earlier, and if you are executing `Check` or `ListObjects` calls against a vulnerable authorization model. Users are advised to upgrade to version 1.1.1. There are no known workarounds for this vulnerability. Users that do not have circular relationships in their models are not affected.

Affected products

• openfga: before 1.1.1 — fixed in 1.1.1

How to fix

Upgrade to a fixed version: openfga 1.1.1. Check the vendor advisory for mitigations.

References

• https://github.com/openfga/openfga/commit/087ce392595f3c319ab3028b5089118ea4063452
• https://github.com/openfga/openfga/security/advisories/GHSA-hr9r-8phq-5x8j
• https://openfga.dev/api/service#/Relationship%20Queries/Check
• https://openfga.dev/api/service#/Relationship%20Queries/ListObjects
• https://github.com/openfga/openfga/commit/087ce392595f3c319ab3028b5089118ea4063452
• https://github.com/openfga/openfga/security/advisories/GHSA-hr9r-8phq-5x8j
• https://openfga.dev/api/service#/Relationship%20Queries/Check
• https://openfga.dev/api/service#/Relationship%20Queries/ListObjects

Get alerted when CVE-2023-35933 or the next vulnerability affects your stack