Security advisory

{
  "id": "e6b5edb4a18c7d7b3b105bb63cc8a5f48a65f888e6d2c723e1dd5035b8eb1c9a",
  "url": "https://osv.dev/vulnerability/CVE-2023-27539",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2023-27539",
    "summary": "There is a denial of service vulnerability in the header parsing component of Rack.",
    "evidence": "osv:CVE-2023-27539",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2023-27539",
      "aliases": [
        "CVE-2023-27539",
        "GHSA-c6qg-cjj8-47qp"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/rack/rack",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1a408687493175250408fe87c5046bf1adfa6386"
                },
                {
                  "fixed": "27addc7f1ae290b6b84c1c351e5b6d75a05bb40b"
                },
                {
                  "introduced": "52901caf09ebcda879512a8605059963a49df55d"
                },
                {
                  "fixed": "098d8e12c1553411ee198d7890c1fd9f1e8cf979"
                },
                {
                  "fixed": "231ef369ad0b542575fb36c74fcfcfabcf6c530c"
                },
                {
                  "fixed": "ee7919ea04303717858be1c3f16b406adc6d8cff"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "fixed": "2.2.6.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:rack:rack:*:*:*:*:*:ruby:*:*",
                    "range": [
                      {
                        "introduced": "3.0.0"
                      },
                      {
                        "fixed": "3.0.6.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "231ef369ad0b542575fb36c74fcfcfabcf6c530c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ee7919ea04303717858be1c3f16b406adc6d8cff"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.2.6.4",
            "3.0.6.1",
            "v2.2.6.3",
            "v3.0.6",
            "v3.0.5",
            "v2.2.6.2",
            "v3.0.4.1",
            "v2.2.6.1",
            "v2.2.6",
            "v3.0.4",
            "v3.0.3",
            "v2.2.5",
            "2.2.4",
            "v3.0.2",
            "v3.0.1",
            "3.0.0",
            "2.2.3",
            "v2.2.2",
            "v2.2.1",
            "2.2.0",
            "2.1.0",
            "2.0.1",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-27539.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.061649788Z",
      "provider": "osv",
      "references": [
        "https://discuss.rubyonrails.org/t/cve-2023-27539-possible-denial-of-service-vulnerability-in-racks-header-parsing/82466",
        "https://lists.debian.org/debian-lts-announce/2023/04/msg00017.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27539.json",
        "https://github.com/advisories/GHSA-c6qg-cjj8-47qp",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-27539",
        "https://security.netapp.com/advisory/ntap-20231208-0016/",
        "https://www.debian.org/security/2023/dsa-5530",
        "https://github.com/rack/rack/commit/231ef369ad0b542575fb36c74fcfcfabcf6c530c",
        "https://github.com/rack/rack/commit/ee7919ea04303717858be1c3f16b406adc6d8cff"
      ],
      "provider_metadata": {
        "cna_assigner": "hackerone",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27539.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-27539",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517361,
  "published_at": "2025-01-09T00:33:47.737+00:00"
}