Vulnerability · Published Jun 12, 2025 · Assigned by GitHub_M

CVE-2025-43866Vantage6 Server JWT secret not cryptographically secure

Low 1.7

In plain English

A low-severity weak randomness in vantage6 from vantage6. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)1.7Low

Exploit odds (30 days)0.4%top 67.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	vantage6-server	4.11.0	GHSA-m3mq-f375-5vgh
PyPI	vantage6-server	4.11.0	PYSEC-2025-221

Affected products (as reported)

Vendor	Product	Versions
vantage6	vantage6	< 4.11

Weakness: CWE-330 · Vector: 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

References

https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh x_refsource_CONFIRM