{"id":"CVE-2025-43866","aliases":["GHSA-m3mq-f375-5vgh","PYSEC-2025-221"],"url":"https://o3.security/vulnerability/CVE-2025-43866","summary":"Vantage6 Server JWT secret not cryptographically secure","details":"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.","published":"2025-06-12T18:04:57.649Z","modified":"2026-08-08T03:48:13.795214300Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"vantage6-server","fixedVersion":"4.11.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/43xxx/CVE-2025-43866.json"},{"type":"ADVISORY","url":"https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-43866"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:48:13.795214300Z"}}