{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "5.0.0"
              },
              {
                "fixed": "5.6.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "13408e3f33dfc3763c44fe96e0d00fa6f6ecc65d"
            }
          ],
          "repo": "https://github.com/apache/httpcomponents-client",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "apache",
    "cwe_ids": [
      "CWE-772"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64607.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "5.0-alpha"
          },
          {
            "last_affected": "5.6.2"
          }
        ],
        "source": "AFFECTED_FIELD"
      },
      {
        "extracted_events": [
          {
            "introduced": "5.0-alpha1"
          },
          {
            "fixed": "5.6.2"
          }
        ],
        "source": "DESCRIPTION"
      }
    ]
  },
  "details": "HttpClient based on the classic i/o model fails to correctly release the underlying connection back to the connection manager if it encounters an invalid or unsupported `Content-Encoding` header value in the response message. Please note this defect does not affect HttpClient based on the async i/o model.\n\nThis issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.",
  "id": "CVE-2026-64607",
  "modified": "2026-08-15T11:31:03.828353566Z",
  "published": "2026-07-31T10:12:18.035Z",
  "references": [
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/13/5"
    },
    {
      "type": "WEB",
      "url": "https://repo.maven.apache.org/maven2/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64607.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64607"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS"
}