What’s Vulnerable › Vulnerabilities

CVE-2026-53656: FiftyOne App server uses wildcard CORS (Access-Control-Allow-Origin: *), enabling cross-origin reads of local server data

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-21 · updated 2026-10-12
• Weakness: CWE-346

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 products

• voxel51 fiftyone: before 1.16.1

References

• https://github.com/voxel51/fiftyone/commit/6c4fa1b27bf53e4ba567742ffd20d033af7b9e64
• https://github.com/voxel51/fiftyone/commit/7c5b92eec5c7c0210c0c8134351ced77d2800ae0
• https://github.com/voxel51/fiftyone/releases/tag/v1.17.0
• https://github.com/voxel51/fiftyone/security/advisories/GHSA-q78p-hj9h-5466

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