CVE-2026-53656

Drive-by local file disclosure via wildcard CORS

Published Aug 21, 2026 · Updated Aug 21, 2026

Origin validation errors in Voxel51 FiftyOne before 1.17.0 allow remote attackers to read local files through a malicious website. The App/API server and /media route set Access-Control-Allow-Origin to a wildcard, while /media accepts a filesystem path without authentication. Exploitation requires a locally running server and a visit to an attacker-controlled page; readable files are limited to the server process's access.

CVSS severity6.3
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation errors in Voxel51 FiftyOne before 1.17.0 allow remote attackers to read local files through a malicious website. The App/API server and /media route set Access-Control-Allow-Origin to a wildcard, while /media accepts a filesystem path without authentication. Exploitation requires a locally running server and a visit to an attacker-controlled page; readable files are limited to the server process's access.

The record

CVE
CVE-2026-53656
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
Voxel51
Product
FiftyOne
Classifications
CWE-942, CWE-346, T1189
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.16.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Voxel51 · FiftyOneversion=< 1.16.1

Published CVSS scores

6.3GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Security Policy with Untrusted Domains
CWE-346Origin Validation Error
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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