PYSEC-2026-2175

Vulnerability from pysec - Published: 2026-04-21 00:16 - Updated: 2026-07-13 05:48
VLAI
Details

Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (/api/4/*) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (Access-Control-Allow-Origin: *). This allows a malicious website to read sensitive system information from a running Glances instance in the victim’s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (/api/4/*) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.

Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Impacted products
Name purl
glances pkg:pypi/glances
Aliases
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {},
      "package": {
        "ecosystem": "PyPI",
        "name": "glances",
        "purl": "pkg:pypi/glances"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.5.4"
            }
          ],
          "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",
        "4.5.2",
        "4.5.3"
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34839",
    "GHSA-gfc2-9qmw-w7vh"
  ],
  "details": "Glances is an open-source system cross-platform monitoring tool. Prior to version 4.5.4, the Glances web server exposes a REST API (`/api/4/*`) that is accessible without authentication and allows cross-origin requests from any origin due to a permissive CORS policy (`Access-Control-Allow-Origin: *`). This allows a malicious website to read sensitive system information from a running Glances instance in the victim\u2019s browser, leading to cross-origin data exfiltration. While a previous advisory exists for XML-RPC CORS issues, this report demonstrates that the REST API (`/api/4/*`) is also affected and exposes significantly more sensitive data. Version 4.5.4 patches the issue.",
  "id": "PYSEC-2026-2175",
  "modified": "2026-07-13T05:48:56.678703Z",
  "published": "2026-04-21T00:16:27.910Z",
  "references": [
    {
      "type": "FIX",
      "url": "https://github.com/nicolargo/glances/commit/fdfb977b1d91b5e410bc06c4e19f8bedb0005ce9"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/nicolargo/glances/security/advisories/GHSA-gfc2-9qmw-w7vh"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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