Security advisory

{
  "id": "61e3d42f829d5420e24b3950c64303d142b4aa739b9f775ab2f3f51cc9a586f8",
  "url": "https://osv.dev/vulnerability/CVE-2021-27737",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-27737",
    "summary": "Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.",
    "evidence": "osv:CVE-2021-27737",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-27737",
      "aliases": [
        "CVE-2021-27737"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/trafficserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b14030656330ed623cd1f9efe2f4f9abd9d16e29"
                },
                {
                  "last_affected": "b14030656330ed623cd1f9efe2f4f9abd9d16e29"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:9.0.0:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0-NA"
                      },
                      {
                        "last_affected": "9.0.0-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "9.0.0-NA",
            "9.0.0-rc1",
            "9.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27737.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:42.772362214Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525%40%3Cdev.trafficserver.apache.org%3E",
        "https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525%40%3Cusers.trafficserver.apache.org%3E",
        "https://lists.apache.org/thread.html/r74f72650c3590478f028ea3a1b8cab2a33d20ad9ff407e894ca70525%40%3Cannounce.trafficserver.apache.org%3E"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-27737",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 435463,
  "published_at": "2021-05-14T21:15:07.45+00:00"
}