Vulnerabilities in pkg:pypi/vantage6-server

PACKAGE
Advisory Identifier: GHSA-m3mq-f375-5vgh
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Advisory Summary

CVE-2025-43866 is a LOW vantage6 server jwt secret not vulnerability (CWE-330: Use of Insufficiently Random Values) affecting Vantage6 server libraries in the PyPI ecosystem. The issue involves vantage6 server jwt secret not cryptographically secure. Remediation is available by upgrading affected packages to version 4.11.0.

3 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/vantage6-server

3 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/vantage6-server. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-m3mq-f375-5vgh CVE-2025-43866 LOW Vantage6 Server JWT secret not cryptographically secure
GHSA-vc3v-ppc7-v486 CVE-2023-47631 HIGH vantage6-server node accepts non-whitelisted algorithms from malicious server
GHSA-45gq-q4xh-cp53 CVE-2024-21671 LOW vantage6 vulnerable to username timing attack

CVE-2025-43866 at a Glance

CVE Identifier CVE-2025-43866
GHSA Identifier GHSA-m3mq-f375-5vgh
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-330: Use of Insufficiently Random Values
Affected Product Vantage6 server
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix CVE-2025-43866

To remediate this vulnerability, upgrade all affected Vantage6 server dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vantage6-server fixed: 4.11.0 
pip install vantage6-server>=4.11.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show vantage6-server

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2025-43866, inspect your installed packages using pip:

pip show vantage6-server

Analyze the terminal output to locate any version of Vantage6 server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.11.0), your application is affected.

Note: The pip show vantage6-server command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-330: Use of Insufficiently Random Values, where the product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. In Vantage6 server, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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](https://docs.python.org/3/library/uuid.html#uuid.uuid1) ### Patches No ### Workarounds You may define JWT secret key in the server configuration file

CVE-2025-43866 Affected Vantage6 server Versions

1 component(s)
Fixed Versions:
4.11.0
Product / Package Ecosystem Affected Versions Fixed Version
vantage6-server
pypi/vantage6-server
PyPI
< 4.11.0
4.11.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh
NVD — CVE-2025-43866 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-43866
Security Fix Commit FIX COMMIT
https://github.com/vantage6/vantage6/commit/e39a262faf1cd4c554bf1b8e57eeea082da995c0
Vantage6 server Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/vantage6-server/PYSEC-2025-221.yaml
Vantage6 server Source Repository REPOSITORY
https://github.com/vantage6/vantage6

Frequently Asked Questions

What is CVE-2025-43866?
CVE-2025-43866 is a security vulnerability in Vantage6 server involving Vantage6 Server JWT secret not cryptographically secure under CWE-330: Use of Insufficiently Random Values.
Which Vantage6 server versions are affected?
Affected versions include releases prior to 4.11.0 across affected packages: vantage6-server.
What version fixes CVE-2025-43866?
Upgrading to 4.11.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is vantage6-server affected?
Yes, vantage6-server is affected in releases prior to 4.11.0. Upgrade your dependency to 4.11.0 or later.
What CWE is associated with CVE-2025-43866?
CVE-2025-43866 is classified under CWE-330: Use of Insufficiently Random Values (The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers.).
How can I check PyPI dependencies for CVE-2025-43866?
Run the dependency tree command: 'pip show vantage6-server'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-m3mq-f375-5vgh",
  "modified" : "2026-06-08T19:52:08Z",
  "published" : "2025-06-12T23:02:13Z",
  "aliases" : [ "CVE-2025-43866" ],
  "summary" : "Vantage6 Server JWT secret not cryptographically secure",
  "details" : "### Impact\nThe 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](https://docs.python.org/3/library/uuid.html#uuid.uuid1)\n\n### Patches\nNo\n\n### Workarounds\nYou may define JWT secret key in the server configuration file",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "vantage6-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.11.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vantage6/vantage6/security/advisories/GHSA-m3mq-f375-5vgh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-43866"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vantage6/vantage6/commit/e39a262faf1cd4c554bf1b8e57eeea082da995c0"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/vantage6-server/PYSEC-2025-221.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vantage6/vantage6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-330" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-06-12T23:02:13Z",
    "nvd_published_at" : "2025-06-12T18:15:20Z"
  }
}