CVE-2024-23823: CORS settings overly permissive in vantage6

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-14 · updated 2026-06-17
Weakness: CWE-863

Description

vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. The vantage6 server has no restrictions on CORS settings. It should be possible for people to set the allowed origins of the server. The impact is limited because v6 does not use session cookies. This issue has been addressed in commit `70bb4e1d8` and is expected to ship in subsequent releases. Users are advised to upgrade as soon as a new release is available. There are no known workarounds for this vulnerability.

Affected products

vantage6: before 4.2.1 — fixed in 4.2.1

How to fix

Upgrade to a fixed version: vantage6 4.2.1. Check the vendor advisory for mitigations.

References

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