Security advisory

{
  "id": "91bfc89ccdaa4fee7a7e9b6c9c75714eec4ed6aef3f8ffcb115dc3247e733873",
  "url": "https://osv.dev/vulnerability/CVE-2016-4554",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-4554",
    "summary": "mime_header.cc in Squid before 3.5.18 allows remote attackers to bypass intended same-origin restrictions and possibly conduct cache-poisoning attacks via a crafted HTTP Host header, aka a \"header smuggling\" issue.",
    "evidence": "osv:CVE-2016-4554",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-4554",
      "aliases": [
        "CVE-2016-4554"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/squid-cache/squid",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0a4efb98f1e84bb7392c7ecc9c7deb0381458b0f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.5.17"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "SQUID_3_5_17",
            "SQUID_3_5_16",
            "SQUID_3_5_15",
            "SQUID_3_5_14",
            "SQUID_3_5_13",
            "SQUID_3_5_12",
            "SQUID_3_5_11",
            "SQUID_3_5_10",
            "SQUID_3_5_9",
            "SQUID_3_5_8",
            "SQUID_3_5_7",
            "SQUID_3_5_6",
            "SQUID_3_5_5",
            "SQUID_3_5_4",
            "SQUID_3_5_3",
            "SQUID_3_5_2",
            "SQUID_3_5_1",
            "SQUID_3_5_0_4",
            "SQUID_3_5_0_3",
            "SQUID_3_5_0_2",
            "SQUID_3_5_0_1",
            "take00",
            "SQUID_3_0_RC1",
            "SQUID_3_0_PRE7",
            "SQUID_3_0_PRE6",
            "SQUID_3_0_PRE5",
            "SQUID_3_0_PRE4",
            "SQUID_3_0_PRE3",
            "SQUID_3_0_PRE2",
            "SQUID_3_0_PRE1",
            "HISTORIC_RELEASES"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4554.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:28.471503690Z",
      "provider": "osv",
      "references": [
        "https://access.redhat.com/errata/RHSA-2016:1138",
        "https://access.redhat.com/errata/RHSA-2016:1139",
        "https://access.redhat.com/errata/RHSA-2016:1140",
        "https://security.gentoo.org/glsa/201607-01"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
              "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*"
            ],
            "vendor_product": "canonical:ubuntu_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "12.04"
                  },
                  {
                    "last_affected": "12.04"
                  },
                  {
                    "introduced": "14.04"
                  },
                  {
                    "last_affected": "14.04"
                  },
                  {
                    "introduced": "15.10"
                  },
                  {
                    "last_affected": "15.10"
                  },
                  {
                    "introduced": "16.04"
                  },
                  {
                    "last_affected": "16.04"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:o:oracle:linux:6:*:*:*:*:*:*:*",
              "cpe:2.3:o:oracle:linux:7:*:*:*:*:*:*:*"
            ],
            "vendor_product": "oracle:linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "6"
                  },
                  {
                    "last_affected": "6"
                  },
                  {
                    "introduced": "7"
                  },
                  {
                    "last_affected": "7"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2016-4554",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 432065,
  "published_at": "2016-05-10T19:59:01.307+00:00"
}