Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M
CVE-2026-53656FiftyOne App server uses wildcard CORS (Access-Control-Allow-Origin: *), enabling cross-origin reads of local server data
Medium 6.3
In plain English
A medium-severity security flaw in fiftyone from voxel51. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | fiftyone | 1.17.0 | GHSA-q78p-hj9h-5466 |
| PyPI | fiftyone | 1.17.0 | PYSEC-2026-3465 |
Affected products (as reported)
Weakness: CWE-346, CWE-942 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
References
- https://github.com/voxel51/fiftyone/security/advisories/GHSA-q78p-hj9h-5466 x_refsource_CONFIRM
- https://github.com/voxel51/fiftyone/commit/6c4fa1b27bf53e4ba567742ffd20d033af7b9e64 x_refsource_MISC
- https://github.com/voxel51/fiftyone/commit/7c5b92eec5c7c0210c0c8134351ced77d2800ae0 x_refsource_MISC
- https://github.com/voxel51/fiftyone/releases/tag/v1.17.0 x_refsource_MISC