Mechanize sends credential headers to a different scheme or port after a redirect

{
  "id": "f027ceab65f4a44a7278add2b2737d2d20d2d4fc6004aa1746a60e92c27ae3fa",
  "url": "https://osv.dev/vulnerability/CVE-2026-107714",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Mechanize sends credential headers to a different scheme or port after a redirect",
    "summary": "The Mechanize library is used for automating interaction with websites. Prior to 2.14.1, Mechanize::HTTP::Agent#response_redirect treats redirects as same-origin when the host matches without consistently comparing scheme and port. A same-host HTTPS-to-HTTP redirect can send Authorization and Cookie headers over cleartext, while a same-host redirect to another port can send a caller-supplied Cookie header to a different service. Cookies in Mechanize#cookie_jar remain scoped separately; the issue affects caller-supplied headers and can disclose credentials without affecting integrity or availability. This issue is fixed in version 2.14.1.",
    "evidence": "osv:CVE-2026-107714",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-107714",
      "aliases": [
        "CVE-2026-107714",
        "GHSA-5jgv-wc2m-xv99"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/sparklemotion/mechanize",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a40941e3a29720850e5b6158340d78e239b4f9a5"
                },
                {
                  "fixed": "02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f"
                },
                {
                  "fixed": "2f97fe358a91928e5e48221f2ec5cb50fa1a43ba"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.14.1"
                      }
                    ],
                    "source": "DESCRIPTION"
                  },
                  {
                    "range": [
                      {
                        "fixed": "02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2f97fe358a91928e5e48221f2ec5cb50fa1a43ba"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a40941e3a29720850e5b6158340d78e239b4f9a5"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.14.1"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.14.0",
            "v2.13.0",
            "v2.12.2",
            "v2.12.1",
            "v2.12.0",
            "v2.11.0",
            "v2.10.1",
            "v2.10.0",
            "v2.9.2",
            "v2.9.1",
            "v2.9.0",
            "v2.8.5",
            "v2.8.4",
            "v2.8.3",
            "v2.8.2",
            "v2.8.1",
            "v2.8.0",
            "v2.7.7",
            "v2.7.6",
            "v2.7.5",
            "v2.7.4",
            "v2.7.4.beta3",
            "v2.7.4.beta2",
            "v2.7.4.beta1",
            "v2.7.3",
            "v2.7.2",
            "v2.7.1",
            "v2.7.0",
            "v2.6.0",
            "v2.5.1",
            "v2.5",
            "v2.4",
            "v2.3",
            "v2.2.1",
            "v2.2",
            "v2.1.1",
            "v2.1",
            "v2.1.pre.1",
            "v2.0.1",
            "v2.0",
            "v2.0.pre.2",
            "v2.0.pre.1",
            "REL_1.0.0",
            "REL_0.9.2",
            "REL_0.9.1",
            "REL_0.8.4",
            "REL_0.8.3",
            "REL_0.8.2",
            "REL_0.8.0",
            "REL_0.7.8",
            "REL_0.7.7",
            "REL_0.7.6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107714.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:53.205490411Z",
      "provider": "osv",
      "references": [
        "https://github.com/sparklemotion/mechanize/releases/tag/v2.14.1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107714.json",
        "https://github.com/sparklemotion/mechanize/security/advisories/GHSA-5jgv-wc2m-xv99",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-107714",
        "https://github.com/sparklemotion/mechanize/commit/02a1235842d6eda8d4a5a3d8f13aba2cecf52e4f",
        "https://github.com/sparklemotion/mechanize/commit/2f97fe358a91928e5e48221f2ec5cb50fa1a43ba",
        "https://github.com/sparklemotion/mechanize/pull/676"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-319",
          "CWE-522"
        ],
        "cna_assigner": "GitHub_M",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "2.15.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107714.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107714",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 522162,
  "published_at": "2026-10-08T21:26:16.092+00:00"
}