{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64607", "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "state": "PUBLISHED", "assignerShortName": "apache", "dateReserved": "2026-07-20T08:23:45.493Z", "datePublished": "2026-07-31T10:12:18.035Z", "dateUpdated": "2026-07-31T16:25:02.593Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://repo.maven.apache.org/maven2/", "defaultStatus": "unaffected", "packageName": "org.apache.httpcomponents.client5:httpclient5", "product": "Apache HttpComponents Client", "vendor": "Apache Software Foundation", "versions": [{"lessThanOrEqual": "5.6.2", "status": "affected", "version": "5.0-alpha", "versionType": "semver"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Yu Bao <by111@126.com>"}], "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>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 `<span style=\"background-color: rgb(255, 255, 255);\">Content-Encoding` header value in the response message.&nbsp;Please note this defect does not affect HttpClient based on the async i/o model.</span></p><p>This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.&nbsp;</p>"}], "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.\u00a0Please 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."}], "metrics": [{"other": {"content": {"text": "important"}, "type": "Textual description of severity"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-772", "description": "CWE-772 Missing Release of Resource after Effective Lifetime", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09", "shortName": "apache", "dateUpdated": "2026-07-31T10:12:18.035Z"}, "references": [{"tags": ["vendor-advisory"], "url": "https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q"}], "source": {"discovery": "UNKNOWN"}, "title": "Apache HttpComponents Client: Connection Leak on Content-Encoding Decode Error Leads to Pool Exhaustion DoS", "x_generator": {"engine": "Vulnogram 0.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "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"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-07-31T16:24:59.439841Z", "id": "CVE-2026-64607", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-31T16:25:02.593Z"}}]}}

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