Security advisory

{
  "id": "a135a040c3fbe7f66ef809f8a89491aeb78c70f540b07273dd3b1539b4101e84",
  "url": "https://osv.dev/vulnerability/CVE-2021-39927",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-39927",
    "summary": "Server side request forgery protections in GitLab CE/EE versions between 8.4 and 14.4.4, between 14.5.0 and 14.5.2, and between 14.6.0 and 14.6.1 would fail to protect against attacks sending requests to localhost on port 80 or 443 if GitLab was configured to run on a port other than 80 or 443",
    "evidence": "osv:CVE-2021-39927",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-39927",
      "aliases": [
        "BIT-gitlab-2021-39927",
        "CVE-2021-39927"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://gitlab.com/gitlab-org/gitlab",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5b5777b8cf3328d27ef549c31f70993da1d1b267"
                },
                {
                  "last_affected": "f7475c863e83756c791917626d3a48bce8e3a975"
                },
                {
                  "introduced": "490a8efda84a04e31ac41b882d95bb717c202437"
                },
                {
                  "last_affected": "c0551c59610dd489bcea25bbdabb752e0380e5bb"
                },
                {
                  "introduced": "518f728f72b10d07e8d7362ab6ddca7844e919ec"
                },
                {
                  "last_affected": "6360adc49dee6a35f101bcb67cdc685c15641679"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "8.4"
                      },
                      {
                        "last_affected": "14.4.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "8.4"
                      },
                      {
                        "last_affected": "14.4.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.5.0"
                      },
                      {
                        "last_affected": "14.5.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.5.0"
                      },
                      {
                        "last_affected": "14.5.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
                    "range": [
                      {
                        "introduced": "14.6.0"
                      },
                      {
                        "last_affected": "14.6.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
                    "range": [
                      {
                        "introduced": "14.6.0"
                      },
                      {
                        "last_affected": "14.6.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v14.6.1-ee",
            "v14.6.0-ee",
            "v14.6.3-ee",
            "v14.5.3-ee",
            "v14.5.1-ee",
            "v14.5.0-ee"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-39927.json"
          }
        }
      ],
      "modified": "2026-10-30T10:30:50.019036371Z",
      "provider": "osv",
      "references": [
        "https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39927.json",
        "https://gitlab.com/gitlab-org/gitlab/-/issues/340476"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-39927",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 438602,
  "published_at": "2022-01-18T17:15:08.67+00:00"
}