{"id":"CVE-2026-55170","aliases":["GHSA-cf98-j28v-49v6","GO-2026-5322"],"url":"https://o3.security/vulnerability/CVE-2026-55170","summary":"OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions","details":"OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorization_model identifier columns can compare case-distinct values such as user:Alice and user:alice as equivalent, causing two distinct check requests to return the same response. This issue is fixed in 1.18.0.","published":"2026-07-09T21:04:28.713Z","modified":"2026-08-12T03:51:10.624762111Z","cvss":null,"epss":{"score":0.00339,"percentile":0.26757,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/openfga/openfga","fixedVersion":"1.18.0"}],"fix":{"url":"https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8","label":"openfga/helm-charts@96d5517"},"references":[{"type":"WEB","url":"https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9"},{"type":"WEB","url":"https://github.com/openfga/openfga/releases/tag/v1.18.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55170.json"},{"type":"ADVISORY","url":"https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55170"},{"type":"FIX","url":"https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8"},{"type":"FIX","url":"https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:10.624762111Z"}}