Vantage6 Server JWT secret not cryptographically secure
Impact
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
Patches
No
Workarounds
You may define JWT secret key in the server configuration file
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | vantage6-server | < 4.11.0 | 4.11.0 |
References
- https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh
- https://nvd.nist.gov/vuln/detail/CVE-2025-43866
- https://github.com/vantage6/vantage6/commit/e39a262faf1cd4c554bf1b8e57eeea082da995c0
- https://github.com/pypa/advisory-database/tree/main/vulns/vantage6-server/PYSEC-2025-221.yaml
- https://github.com/vantage6/vantage6
- CVSS 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- Weakness (CWE)
CWE-330- Platform
- Python (PyPI)
- Package
vantage6-server- Disclosed
- 12.06.2025
- Updated
- 11.10.2026 12:19
Sources and licenses
OSV / GitHub Advisory Database - PYSEC-2025-221 - PyPA Advisory Database; CC BY 4.0
OSV / GitHub Advisory Database - GHSA-m3mq-f375-5vgh - CC BY 4.0
Vulnerability history: vantage6-server
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 5
- First → latest
- 11.2023 06.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 2
- Low 2
Disclosures per year
- 2023: 1
- 2024: 3
- 2025: 1
- 2026: 0
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