{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:linuxfoundation:cortex:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.9.0"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "ed4f3395f8ba0098a827c5ae4ca8a2901674806c"
            }
          ],
          "repo": "https://github.com/cortexproject/cortex",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {},
  "details": "An issue was discovered in Grafana Cortex through 1.9.0. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as ae ../../sensitive/path/in/deployment pathname, then Cortex will attempt to parse a rules file at that location and include some of the contents in the error message. (Other Cortex API requests can also be sent a malicious OrgID header, e.g., tricking the ingester into writing metrics to a different location, but the effect is nuisance rather than information disclosure.)",
  "id": "CVE-2021-36157",
  "modified": "2026-07-08T05:37:30.656819461Z",
  "published": "2021-08-03T15:15:08.667Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://grafana.com/docs/grafana/latest/release-notes/"
    },
    {
      "type": "FIX",
      "url": "https://github.com/cortexproject/cortex/pull/4375"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}