{"id":"CVE-2026-55170","state":"PUBLISHED","title":"OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions","description":"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.","publishedAt":"2026-07-09T21:04:28.713Z","updatedAt":"2026-07-10T14:26:15.294Z","severity":{"score":2.1,"label":"Low","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["openfga openfga"],"affected":[{"vendor":"openfga","product":"openfga","versions":[{"version":"< 1.18.0","status":"affected"}]}],"references":["https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6","https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8","https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11","https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9","https://github.com/openfga/openfga/releases/tag/v1.18.0"],"weaknesses":["CWE-178"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55170.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55170","state":"PUBLISHED","datePublished":"2026-07-09T21:04:28.713Z","dateUpdated":"2026-07-10T14:26:15.294Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T15:13:28.166Z"},"containers":{"cna":{"title":"OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"openfga","product":"openfga","versions":[{"version":"< 1.18.0","status":"affected"}]}],"references":[{"url":"https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6","name":"https://github.com/openfga/openfga/security/advisories/GHSA-cf98-j28v-49v6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8","name":"https://github.com/openfga/helm-charts/commit/96d5517a2693ff5def451dee7d6b9d1baeb281f8","tags":["x_refsource_MISC"]},{"url":"https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11","name":"https://github.com/openfga/openfga/commit/a2e0dbefc3e01a95c785f81a3563bc6571b08b11","tags":["x_refsource_MISC"]},{"url":"https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9","name":"https://github.com/openfga/helm-charts/releases/tag/openfga-0.3.9","tags":["x_refsource_MISC"]},{"url":"https://github.com/openfga/openfga/releases/tag/v1.18.0","name":"https://github.com/openfga/openfga/releases/tag/v1.18.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":2.1,"baseSeverity":"LOW","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-178","lang":"en","description":"CWE-178: Improper Handling of Case Sensitivity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-09T21:04:28.713Z"},"source":{"advisory":"GHSA-cf98-j28v-49v6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-10T14:26:05.820781Z","id":"CVE-2026-55170","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-10T14:26:15.294Z"}}]}}}