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Advisory record · GHSA-q78p-hj9h-5466

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

CVSS 6.3 MediumEPSS 0.0012 · 1st percentile

Published by the GitHub Advisory Database at 15 Jul 2026, 21:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
fiftyonePyPI<1.17.01.17.0
Identifiers
GHSA-q78p-hj9h-5466 · CVE-2026-53656 · PYSEC-2026-3465
Weakness (CWE)
CWE-346 · CWE-942
Tags
Published
15 Jul 2026
Updated
23 Jul 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

FiftyOne versions before 1.17.0 send a wildcard CORS header (Access-Control-Allow-Origin: *) from the App server and its /media route. An unauthenticated attacker can get a user with a running FiftyOne server to visit a malicious web page, which can then read files the server process can access and send them elsewhere. Upgrade to FiftyOne 1.17.0 or later, which restricts cross-origin access to same-origin by default.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.3 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0012, the 1st percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:41 UTC First seen by agentprime
  2. 31 Oct 2026, 14:41 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.