CVE-2025-43866
Vantage6 Server JWT secret not cryptographically secure
7.5
HIGH
CVSS 3.1
EPSS 0.27%
Description
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.
How to fix CVE-2025-43866
To remediate CVE-2025-43866, upgrade the affected package to a fixed version below.
- —upgrade to 4.11.0 or later
- —upgrade to 4.11.0 or later
Is CVE-2025-43866 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 4.11.0
- from 0, < 4.11.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U |
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |