Security advisory

{
  "id": "3f76e0f5d113fdccf0be6a3b2e2b419004531d4395d11ebb5473a6d0fb25ebb7",
  "url": "https://osv.dev/vulnerability/CVE-2021-39909",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39909",
    "summary": "Lack of email address ownership verification in the CODEOWNERS feature in all versions of GitLab EE starting from 11.3 before 14.2.6, all versions starting from 14.3 before 14.3.4, and all versions starting from 14.4 before 14.4.1 allows an attacker to bypass CODEOWNERS Merge Request approval requirement under rare circumstances",
    "evidence": "osv:CVE-2021-39909",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39909",
      "aliases": [
        "BIT-gitlab-2021-39909",
        "CVE-2021-39909"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1bbe39452664021af90851aef8527ce5e850343e"
                },
                {
                  "fixed": "9ed95b96a6766af9336048a63a29b678f88a9413"
                },
                {
                  "fixed": "abc23a14bace184532d1d344c4d230d9fc99eba6"
                },
                {
                  "introduced": "dec73e99fddac59c0bf816dc4bffd2a30abae6de"
                },
                {
                  "fixed": "3e776d83389c706fb81973736e57ca6a6fb952fc"
                },
                {
                  "introduced": "44dbeccbe1039cb1d42d8502655ffb0bce3ae803"
                },
                {
                  "fixed": "3e776d83389c706fb81973736e57ca6a6fb952fc"
                },
                {
                  "introduced": "19c719febd74b6edf549bf6a2c0e36bf8f176d56"
                },
                {
                  "last_affected": "19c719febd74b6edf549bf6a2c0e36bf8f176d56"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.3.0"
                      },
                      {
                        "fixed": "14.2.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.3.0"
                      },
                      {
                        "fixed": "14.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.3.0"
                      },
                      {
                        "fixed": "14.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "11.2.0"
                      },
                      {
                        "fixed": "14.3.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:14.4.0:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.4.0"
                      },
                      {
                        "last_affected": "14.4.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "14.4.0",
            "v14.3.2-ee",
            "v14.4.0-ee",
            "v14.3.3-ee",
            "v14.3.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39909.json"
          }
        }
      ],
      "modified": "2026-10-30T10:31:03.458908083Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39909.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/335191",
        "https://hackerone.com/reports/1237750"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39909",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 440565,
  "published_at": "2021-11-05T00:15:11.147+00:00"
}