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

Quick assessment

Affected
voxel51 fiftyone
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

漏洞描述翻译如下： FiftyOne 是一个开源平台，用于精炼高质量数据集和可视化人工智能模型。在版本 1.17.0 之前， 中的 FiftyOne App/API 服务器以及 中的 路由会无条件地返回 响应头。由于该嵌入式服务器是本地运行的且无需身份验证，用户访问恶意网站时，该网站可以读取跨源响应。 端点接受一个文件系统路径，这使得恶意网页无需用户额外点击即可读取服务器进程可访问的文件并将其数据外泄。 通过 配置项和 环境变量，现在可以显式指定允许跨源访问的来源；默认策略为“同源”（same-origin）。该问

CVSS 6.3 · Medium EPSS 0.09% · P1

Affected Version Matrix 1

VendorProduct Version RangeStatus
voxel51 fiftyone < 1.16.1 affected
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I. Basic Information for CVE-2026-53656

Vulnerability Information
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Vulnerability Title
FiftyOne App server uses wildcard CORS (Access-Control-Allow-Origin: *), enabling cross-origin reads of local server data
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
voxel51 fiftyone < 1.16.1 -

II. Public POCs for CVE-2026-53656

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III. Intelligence Information for CVE-2026-53656

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Patches & Fixes for CVE-2026-53656 (2)

Vendor Advisories for CVE-2026-53656 (1)

Vendor Pages for CVE-2026-53656 (1)

IV. Related Vulnerabilities

Same weakness: CWE-346

V. Comments for CVE-2026-53656

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