GHSA-F74P-CWHP-X2WX

Vulnerability from github – Published: 2026-06-22 15:30 – Updated: 2026-09-21 22:54
VLAI
Summary
Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability.
Details

The Loki datasource plugin's callResource handler contains a path traversal vulnerability. An authenticated Viewer-role user can escape the plugin's resource sandbox and access administrative Loki endpoints (e.g. /config, /services, /ready) to extract sensitive backend configuration and internal service information.

Severity
7.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 11.6.15"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0-beta1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.2.9"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.3.7"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.3.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 13.0.2"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "13.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 12.4.4"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "12.4.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/grafana/grafana"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.9.2-0.20260616075434-82ef13993059"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42129"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-09-21T22:54:43Z",
    "nvd_published_at": "2026-06-22T14:17:36Z",
    "severity": "HIGH"
  },
  "details": "The Loki datasource plugin\u0027s callResource handler contains a path traversal vulnerability. An authenticated Viewer-role user can escape the plugin\u0027s resource sandbox and access administrative Loki endpoints (e.g. /config, /services, /ready) to extract sensitive backend configuration and internal service information.",
  "id": "GHSA-f74p-cwhp-x2wx",
  "modified": "2026-09-21T22:54:43Z",
  "published": "2026-06-22T15:30:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42129"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/3fcdbc5a6e5c955bd42bd3715dd03cbad2b078c1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/42cdc39124912a8506a0c613c319c345aa950b29"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/82ef13993059351bf21de35b8488bbd9b42df4f4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/d27d2eba9c509d16f214d290436a6ad0bd9c6c01"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/dd5dc51681ff0133ddb2e206c2ea318713aeca16"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/eeb08ceb020c4381242d8400e5878044e9877505"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/commit/f70d3e480274a5dbd12006338c393f4b05d441ca"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/grafana/grafana"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v11.6.15"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.2.9"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.3.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v12.4.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/grafana/grafana/releases/tag/v13.0.2"
    },
    {
      "type": "WEB",
      "url": "https://grafana.com/security/security-advisories/cve-2026-42129"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Grafana Loki datasource plugin\u0027s callResource handler contains a path traversal vulnerability."
}



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