{"id":"UBUNTU-CVE-2026-64607","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. This issue affects Apache HttpComponents Client: from 5.0-alpha1 through 5.6.2.","modified":"2026-08-06T00:23:22Z","published":"2026-07-31T11:17:00Z","upstream":["CVE-2026-64607"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-64607"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-64607"},{"type":"REPORT","url":"https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q"}],"affected":[{"package":{"name":"commons-httpclient","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/commons-httpclient?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1-10.2","3.1-10.2ubuntu0.14.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.1-10.2ubuntu0.14.04.1","binary_name":"libcommons-httpclient-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.5-2","4.3.2-1","4.3.3-1","4.3.3-1ubuntu0.1","4.3.3-1ubuntu0.1+esm1","4.3.3-1ubuntu0.1+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.3.3-1ubuntu0.1+esm2","binary_name":"libhttpclient-java"},{"binary_name":"libhttpmime-java","binary_version":"4.3.3-1ubuntu0.1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"commons-httpclient","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/commons-httpclient?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1-11ubuntu1","3.1-12"],"ecosystem_specific":{"binaries":[{"binary_name":"libcommons-httpclient-java","binary_version":"3.1-12"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.1-1","4.5.1-1","4.5.1-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.5.1-1ubuntu0.1~esm1"},{"binary_name":"libhttpmime-java","binary_version":"4.5.1-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"commons-httpclient","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/commons-httpclient?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1-13","3.1-14","3.1-15~18.04"],"ecosystem_specific":{"binaries":[{"binary_name":"libcommons-httpclient-java","binary_version":"3.1-15~18.04"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.3-1","4.5.4-1","4.5.5-1","4.5.5-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.5.5-1ubuntu0.1~esm1","binary_name":"libhttpclient-java"},{"binary_version":"4.5.5-1ubuntu0.1~esm1","binary_name":"libhttpmime-java"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"commons-httpclient","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/commons-httpclient?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1-15"],"ecosystem_specific":{"binaries":[{"binary_name":"libcommons-httpclient-java","binary_version":"3.1-15"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"httpcomponents-client","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/httpcomponents-client?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.5.9-1","4.5.10-2","4.5.11-1","4.5.11-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libhttpclient-java","binary_version":"4.5.11-1ubuntu0.1~esm1"},{"binary_name":"libhttpmime-java","binary_version":"4.5.11-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"}},{"package":{"name":"commons-httpclient","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/commons-httpclient?arch=source&distro=jammy"},"ranges":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