A Python client for the Global CVE Allocation System

The Global CVE (GCVE) allocation system is a new, decentralized approach to vulnerability identification and numbering, designed to improve flexibility, scalability, and autonomy for participating entities.

This client can be integrated into software such as Vulnerability-Lookup to provide core GCVE functionalities by adhering to the Best Current Practices.
It can also be used as a standalone command-line tool.

Examples of usage

As a command line tool

First install the gcve client:

$ python -m pip install --user pipx
$ python -m pipx ensurepath

$ pipx install gcve
  installed package gcve 0.11.0, installed using Python 3.13.0
  These apps are now globally available
    - gcve
done! ✨ 🌟 ✨

Pulling the registry locally

$ gcve registry --pull
Pulling from registry…
Downloaded updated https://gcve.eu/dist/key/public.pem to .gcve/registry/public.pem
Downloaded updated https://gcve.eu/dist/gcve.json.sigsha512 to .gcve/registry/gcve.json.sigsha512
Downloaded updated https://gcve.eu/dist/gcve.json to .gcve/registry/gcve.json
Integrity check passed successfully.

Retrieving a GNA

Note: This operation is case sensitive.

$ gcve registry --get CIRCL
{
  "id": 1,
  "short_name": "CIRCL",
  "cpe_vendor_name": "circl",
  "full_name": "Computer Incident Response Center Luxembourg",
  "gcve_url": "https://vulnerability.circl.lu/",
  "gcve_api": "https://vulnerability.circl.lu/api/",
  "gcve_dump": "https://vulnerability.circl.lu/dumps/",
  "gcve_allocation": "https://vulnerability.circl.lu/",
  "gcve_pull_api": "https://vulnerability.circl.lu/"
}

$ gcve registry --get CIRCL | jq .id
1

Searching the Registry

Note: Search operations are case insensitive.

$ gcve registry --find cert
[
  {
    "id": 106,
    "full_name": "National Cyber Security Centre SK-CERT",
    "short_name": "SK-CERT",
    "gcve_url": "https://www.sk-cert.sk/"
  },
  {
    "id": 680,
    "short_name": "DFN-CERT",
    "full_name": "DFN-CERT Services GmbH",
    "gcve_url": "https://adv-archiv.dfn-cert.de/"
  }
]

Pulling the references file

$ gcve references --pull
Pulling references…
Downloaded updated https://gcve.eu/dist/references.json to .gcve/references/references.json
References downloaded successfully.

Listing references

$ gcve references --list
{
  "kev": [
    {
      "uuid": "405284c2-e461-4670-8979-7fd2c9755a60",
      "short_name": "CISA KEV"
    },
    {
      "uuid": "1a89b78e-f703-45f3-bb86-59eb712668bd",
      "short_name": "CIRCL",
      "gcve_gna_id": 1
    },
    {
      "uuid": "cce329bf-df49-4c6e-a027-80be2e6483bd",
      "short_name": "EUVD KEV",
      "gcve_gna_id": 2
    }
  ]
}

As a library

Verifying the integrity of your local GNA directory copy

Python 3.13.0 (main, Oct 10 2024, 07:28:38) [GCC 12.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from typing import List
... from gcve.gna import GNAEntry
... from gcve.registry import (
...     update_registry_public_key,
...     update_registry_signature,
...     update_registry,
...     verify_registry_integrity,
...     load_registry,
... )
... 
>>> update_registry_public_key()
No changes — using cached .gcve/registry/public.pem.
False
>>> update_registry_signature()
No changes — using cached .gcve/registry/gcve.json.sigsha512.
False
>>> update_registry()
No changes — using cached .gcve/registry/gcve.json.
False
>>> if verify_registry_integrity():
...     gcve_data: List[GNAEntry] = load_registry()
...     
>>>

Loading references

>>> from gcve.registry import update_references, load_references
>>>
>>> update_references()
Downloaded updated https://gcve.eu/dist/references.json to .gcve/references/references.json
True
>>> references = load_references()
>>> references['kev'][0]
{'uuid': '405284c2-e461-4670-8979-7fd2c9755a60', 'short_name': 'CISA KEV'}

Generating new GCVE entries

Example with GCVE-1 entries (CIRCL namespace):

from typing import List
from gcve.gna import GNAEntry
from gcve import gcve_generator, get_gna_id_by_short_name, to_gcve_id
from gcve.gna import GNAEntry
from gcve.registry import update_registry, load_registry

# Retrieve the JSON Directory file available at GCVE.eu if it has changed
update_registry()
# Initializes the GNA entries
gcve_data = load_registry()

# If "CIRCL" found in the registry
if CIRCL_GNA_ID := get_gna_id_by_short_name("CIRCL", gcve_data):
    # Existing GCVE-O
    existing_gcves = {to_gcve_id(cve) for cve in vulnerabilitylookup.get_all_ids()}

    generator = gcve_generator(existing_gcves, CIRCL_GNA_ID)
    for _ in range(5):
        print(next(generator))

License

GCVE is licensed under GNU General Public License version 3.

• Copyright (c) 2025-2026 Computer Incident Response Center Luxembourg (CIRCL)
• Copyright (c) 2025-2026 Cédric Bonhomme - https://github.com/cedricbonhomme

Contact

Att: GCVE.EU
CIRCL - Computer Incident Response Center Luxembourg
c/o "Luxembourg House of Cybersecurity" g.i.e.
122, rue Adolphe Fischer
L-1521 Luxembourg
Grand-Duchy of Luxembourg