{"cve":"CVE-2023-35933","nvd":{"published":"2023-06-26T20:15:10.580","modified":"2026-06-17T06:05:29.783","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-835"],"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"],"products":["openfga:openfga"],"source":"nvd","synced_at":"2026-10-19T21:38:30.124994567+00:00"},"epss":{"cve":"CVE-2023-35933","score":0.01133,"percentile":0.66465,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-hr9r-8phq-5x8j","url":"https://osv.dev/vulnerability/GHSA-hr9r-8phq-5x8j","summary":"OpenFGA vulnerable to denial of service due to circular relationship","modified":"2023-11-08T04:12:54.656803Z","packages":[{"ecosystem":"Go","name":"github.com/openfga/openfga","purl":"pkg:golang/github.com/openfga/openfga","ranges":["<1.1.1"],"fixed":["1.1.1"]}]},{"id":"GO-2023-1872","url":"https://osv.dev/vulnerability/GO-2023-1872","summary":"Denial of service in github.com/openfga/openfga","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/openfga/openfga","purl":"pkg:golang/github.com/openfga/openfga","ranges":["<1.1.1"],"fixed":["1.1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}