{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "0.23.35"
              },
              {
                "introduced": "1.0.0-M1"
              },
              {
                "fixed": "1.0.0-M47"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "756ce63aee681c5b632bbeafe0b8fde2f3d237f4"
            },
            {
              "fixed": "a83f5f4f7e14c5b4d4a91dd71b105cbbbb391298"
            },
            {
              "fixed": "6083780a3009bd7b26033b0ceb3d32c658b0377e"
            },
            {
              "fixed": "c0a37f38d5ee2a568ba57bd9da62f8d79b8b1fcc"
            }
          ],
          "repo": "https://github.com/http4s/http4s",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-grh8-3p95-f9rr"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1275",
      "CWE-565"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69215.json"
  },
  "details": "Http4s is a Scala interface for HTTP services. Prior to 0.23.35 and 1.0.0-M47, The CookieJar client middleware uses unanchored substring checks instead of RFC 6265 domain and path matching when deciding whether to attach a stored cookie. A cookie for example.com can consequently be sent to an attacker-controlled hostname such as evilexample.com when an application using the same jar makes an attacker-influenced outbound request. This exposes session or authentication cookies and can enable hijacking of the application’s outbound sessions. This issue is fixed in versions 0.23.35 and 1.0.0-M47.",
  "id": "CVE-2026-69215",
  "modified": "2026-09-17T03:30:49.965825458Z",
  "published": "2026-09-15T19:17:12.429Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/http4s/http4s/releases/tag/v0.23.35"
    },
    {
      "type": "WEB",
      "url": "https://github.com/http4s/http4s/releases/tag/v1.0.0-M47"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69215.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/http4s/http4s/security/advisories/GHSA-grh8-3p95-f9rr"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69215"
    },
    {
      "type": "FIX",
      "url": "https://github.com/http4s/http4s/commit/c0a37f38d5ee2a568ba57bd9da62f8d79b8b1fcc"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Http4s: CookieJar middleware matches by substring, leaking cookies cross-origin"
}