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CVE-2026-64607

Estado: ModificadaMedia (5.3)—

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.

This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Apache — Httpclient

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-64607",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2026-64607",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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          ],
          "version": "2.0.3",
          "timestamp": "2026-07-31T16:24:59.439841Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
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  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache HttpComponents Client",
          "versions": [
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              "versionType": "semver",
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          "packageName": "org.apache.httpcomponents.client5:httpclient5",
          "collectionURL": "https://repo.maven.apache.org/maven2/",
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  "published": "2026-07-31T11:17:11.710",
  "references": [
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        "Mailing List",
        "Release Notes"
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      "value": "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."
    }
  ],
  "lastModified": "2026-08-13T17:17:33.733",
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