{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.0.1"
              },
              {
                "introduced": "0"
              },
              {
                "fixed": "7.15.2"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "643356760d8efce521dfce2587d63fd9d0c70d72"
            },
            {
              "fixed": "3aeea0406aab88cbbd86531313d7cebf8ae149a4"
            },
            {
              "introduced": "0"
            },
            {
              "fixed": "744101956d78b7c1384d0cbf379db13e859167bf"
            }
          ],
          "repo": "https://github.com/guzzle/guzzle",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-v5mv-p594-2x33"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-180",
      "CWE-436",
      "CWE-918",
      "CWE-941"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69246.json"
  },
  "details": "Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPT_URL to the URI exactly as written and push that Host into CURLOPT_HTTPHEADER; StreamHandler does the same through fopen(). libcurl then parses the authority itself, percent-decoding it and, on an IDN-capable build, applying IDNA mapping, and uses the result to resolve, connect, name the TLS peer and address a proxy CONNECT, while the supplied Host suppresses the aligned one libcurl would have generated. For a URI host written as 127.0.0.%31, filter_var() rejects the host as an IP literal, yet libcurl decodes it to 127.0.0.1 and reaches loopback with no DNS lookup while the server receives Host: 127.0.0.%31. An attacker who influences a fetched URI can therefore reach a host the application's checks excluded and read whatever the host exposes of the response. The same divergence moves Guzzle's own decisions onto a spelling the transport does not use: no_proxy selects proxy routing from the literal host, and RedirectMiddleware decides from it whether to strip Authorization and Cookie. Exploitation requires the application to build a request URI from untrusted input and to make a host decision before handing it to Guzzle. This issue is fixed in versions 7.15.2 and 8.0.1.",
  "id": "CVE-2026-69246",
  "modified": "2026-08-04T11:31:08.147796227Z",
  "published": "2026-08-03T21:07:04.228Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/69xxx/CVE-2026-69246.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/guzzle/guzzle/commit/3aeea0406aab88cbbd86531313d7cebf8ae149a4"
    },
    {
      "type": "FIX",
      "url": "https://github.com/guzzle/guzzle/commit/744101956d78b7c1384d0cbf379db13e859167bf"
    },
    {
      "type": "FIX",
      "url": "https://github.com/guzzle/guzzle/pull/3907"
    },
    {
      "type": "FIX",
      "url": "https://github.com/guzzle/guzzle/pull/3908"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/guzzle/releases/tag/7.15.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/guzzle/guzzle/releases/tag/8.0.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/guzzle/guzzle/security/advisories/GHSA-v5mv-p594-2x33"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-69246"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Guzzle: Noncanonical host can bypass host-based checks"
}