CVE-2025-43866: VANTAGE6

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

vantage6 is an open-source infrastructure for privacy preserving analysis. The JWT secret key in the vantage6 server is auto-generated unless defined by the user. The auto-generated key is a UUID1, which is not cryptographically secure as it is predictable to some extent. This vulnerability is fixed in 4.11.0.

Affected products

• VANTAGE6 VANTAGE6: before 4.11.0 (fixed in 4.11.0)

Published 2025-06-12. Last modified 2026-06-17.