Security advisory

{
  "id": "cc1e896136c25f534630f2af24a72efb3a2f01489107c3f10dc01c0174d10786",
  "url": "https://osv.dev/vulnerability/CVE-2021-27577",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-27577",
    "summary": "Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.",
    "evidence": "osv:CVE-2021-27577",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-27577",
      "aliases": [
        "CVE-2021-27577"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/trafficserver",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6c1c6cf20e7d0e287d697a0f4181436013d17c30"
                },
                {
                  "last_affected": "8e8bf8c583d55e46c4de34cccee0c4c5df83e979"
                },
                {
                  "introduced": "b310e3566f58dd04ec2b15b111ec86ea70e20019"
                },
                {
                  "last_affected": "c71b082690599c6da5efe981175fcb9a1a961a1b"
                },
                {
                  "introduced": "b14030656330ed623cd1f9efe2f4f9abd9d16e29"
                },
                {
                  "last_affected": "3bb1ae9fa5c71b8e65cb782f402d8780b522693d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0.0"
                      },
                      {
                        "last_affected": "7.1.12"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.0.0"
                      },
                      {
                        "last_affected": "8.1.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "last_affected": "9.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "9.0.1-rc1",
            "9.0.1",
            "9.0.1-rc0",
            "9.0.0-rc1",
            "9.0.0",
            "8.1.1-rc0",
            "8.1.1",
            "8.1.0-rc0",
            "8.1.0",
            "8.0.6-rc1",
            "8.0.6",
            "8.0.6-rc0",
            "8.0.5",
            "8.0.4",
            "8.0.4-rc0",
            "8.0.3-rc0",
            "8.0.3",
            "8.0.2-rc0",
            "8.0.2",
            "8.0.1-rc0",
            "8.0.1",
            "8.0.0-rc4",
            "8.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27577.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:29.985922407Z",
      "provider": "osv",
      "references": [
        "https://lists.apache.org/thread.html/ra1a41ff92a70d25bf576d7da2590575e8ff430393a3f4a0c34de4277%40%3Cusers.trafficserver.apache.org%3E",
        "https://www.debian.org/security/2021/dsa-4957"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-27577",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432469,
  "published_at": "2021-06-29T12:15:08.437+00:00"
}