{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "7.15.1"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "61443dfb33c62f308ee8add20f45b4d6e4bf8d2f"
            }
          ],
          "repo": "https://github.com/guzzle/guzzle",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f283-ghqc-fg79"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67353.json"
  },
  "details": "guzzlehttp/guzzle versions before 7.15.1 contain a denial of service vulnerability in the CookieJar that accepts unlimited Set-Cookie header fields with no size restrictions. Attackers can return many large cookies from a malicious server, causing Guzzle to store excessive data in memory and generate oversized Cookie headers that fail in handlers or destination servers.",
  "id": "CVE-2026-67353",
  "modified": "2026-08-04T11:31:02.036755430Z",
  "published": "2026-08-01T12:22:17.339Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67353.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/guzzle/guzzle/security/advisories/GHSA-f283-ghqc-fg79"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67353"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/guzzlehttp-guzzle-before-unbounded-cookie-denial-of-service"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "guzzlehttp/guzzle before 7.15.1 Unbounded Cookie Denial of Service"
}