Medium
commons-httpclient, httpcomponents-client — security advisory
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.
- Products
- commons-httpclient, httpcomponents-client
- Affected versions
- 3.1-10.2, 3.1-10.2ubuntu0.14.04.1, 3.1-11ubuntu1, 3.1-12, 3.1-13, 3.1-14, 3.1-15, 3.1-15~18.04, 3.1-16, 3.1-16build1, 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, 4.4.1-1, 4.5.1-1, 4.5.1-1ubuntu0.1~esm1, 4.5.10-2, 4.5.11-1, 4.5.11-1ubuntu0.1~esm1, 4.5.13-2, 4.5.13-3, 4.5.14-1, 4.5.14-1build1, 4.5.3-1, 4.5.4-1, 4.5.5-1, 4.5.5-1ubuntu0.1~esm1, 4.5.9-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-64607
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:12 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-64607
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
commons-httpclient
Fixed versions: Not specified
httpcomponents-client
Fixed versions: Not specified
Complete source record
{
"id": "b6b4f176156992f246963b926402f498a484108367ab44f1bfa822977906005c",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-64607",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-64607",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2026-64607",
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"aliases": [
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],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-64607.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libhttpclient-java",
"binary_version": "4.5.14-1build1"
},
{
"binary_name": "libhttpmime-java",
"binary_version": "4.5.14-1build1"
}
]
}
}
],
"modified": "2026-10-17T13:00:33.939286919Z",
"provider": "osv",
"upstream": [
"CVE-2026-64607"
],
"references": [
"https://ubuntu.com/security/CVE-2026-64607",
"https://www.cve.org/CVERecord?id=CVE-2026-64607",
"https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q"
]
},
"related_cves": [
{
"value": "CVE-2026-64607",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360696,
"published_at": "2026-07-31T11:17:00+00:00"
}