{"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":"## Description\n\nIn OpenFGA, when MySQL is being used as the datastore, two distinct check requests can return the same response.\n\n## Preconditions\n\nThis applies if the following preconditions are met:\n\n1. You run OpenFGA with MySQL as the datastore\n2. Your authorization decisions rely on case-sensitive user strings.\n\n## Fix\nUpgrade to OpenFGA 1.18.0 or greater.\n\n## Acknowledgements\nOpenFGA would like to thank @sahajamoth for the detailed report.","published":"2026-07-09T21:04:28.713Z","modified":"2026-10-21T02:30:40.155572234Z","cvss":null,"epss":{"score":0.00339,"percentile":0.27269,"asOf":"2026-09-17"},"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"},{"type":"PACKAGE","url":"https://github.com/openfga/openfga"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:30:40.155572234Z"}}