{"id":"CVE-2026-53656","summary":"FiftyOne App server uses wildcard CORS (Access-Control-Allow-Origin: *), enabling cross-origin reads of local server data","details":"FiftyOne is an open-source platform for refining high-quality datasets and visual AI models. Prior to 1.17.0, the FiftyOne App/API server in fiftyone/server/app.py and the /media route in fiftyone/server/routes/media.py unconditionally return Access-Control-Allow-Origin: *. Because the embedded server is local and unauthenticated, a malicious website visited by the user can read cross-origin responses. The /media endpoint accepts a filesystem path, allowing a drive-by page to read files accessible to the server process and exfiltrate them without additional clicks. The allowed_origins configuration and FIFTYONE_ALLOWED_ORIGINS environment variable now make cross-origin access explicit, while the default policy is same-origin. This issue is fixed in version 1.17.0.","aliases":["GHSA-q78p-hj9h-5466","PYSEC-2026-3465"],"modified":"2026-08-23T04:00:46.590311779Z","published":"2026-08-21T20:34:55.783Z","database_specific":{"cwe_ids":["CWE-346","CWE-942"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53656.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"1.16.1"}]}],"cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/voxel51/fiftyone/releases/tag/v1.17.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53656.json"},{"type":"ADVISORY","url":"https://github.com/voxel51/fiftyone/security/advisories/GHSA-q78p-hj9h-5466"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53656"},{"type":"FIX","url":"https://github.com/voxel51/fiftyone/commit/6c4fa1b27bf53e4ba567742ffd20d033af7b9e64"},{"type":"FIX","url":"https://github.com/voxel51/fiftyone/commit/7c5b92eec5c7c0210c0c8134351ced77d2800ae0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/voxel51/fiftyone","events":[{"introduced":"0"},{"fixed":"6c4fa1b27bf53e4ba567742ffd20d033af7b9e64"},{"fixed":"7c5b92eec5c7c0210c0c8134351ced77d2800ae0"},{"fixed":"9b7a4b7ec057ff37299cebf751b36500827e6b50"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v1.16.0","v1.15.0","v1.14.2","v1.14.1","v1.13.5","v1.14.0","v1.13.4","v1.13.3","v1.13.2","v1.13.1","v1.13.0","v1.12.0","v1.11.1","v1.11.0","v1.10.0","v1.9.0","v1.8.1","v1.8.0","v1.7.2","v1.7.1","v1.7.0","db-v0.4.0","v1.6.0","v1.5.2","v1.5.1","v1.5.0-dockerbuild","v1.5.0","v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.2","v1.0.1","db-v1.1.7","v1.0.0","db-v1.1.6","v0.25.2","v0.25.1","v0.25.0","desktop-v0.35.0","v0.24.1","desktop-v0.34.1","v0.24.0","desktop-v0.34.0","v0.23.8","desktop-v0.33.7","v0.23.7","desktop-v0.33.6","v0.23.6","desktop-v0.33.5","v0.23.5","desktop-v0.33.4","v0.23.4","v0.23.3","desktop-v0.33.3","v0.23.2","desktop-v0.33.2","v0.23.1","desktop-v0.33.1","v0.23.0","desktop-v0.33.0","build-docs","v0.22.3","desktop-v0.32.0","db-v0.4.1","v0.22.2","desktop-v0.31.0","v0.22.1","desktop-v0.30.2","desktop-v0.30.1","v0.22.0","desktop-v0.30.0","v0.21.6","desktop-v0.29.0","v0.21.5","v0.21.3","desktop-v0.28.2","v0.21.1","desktop-v0.28.0","v0.21.0","desktop-v0.27.0","v0.7.1.2","v0.6.1","gui-v0.6.1","v0.6.0.1","v0.5.5","gui-v0.5.5","gui-v0.5.4","v0.3.0","v0.2.1","gui-v0.2.1","db-v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53656.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"}]}