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Change History

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

{"timestamp":"2026-07-31T16:24:59.439841Z","id":"CVE-2026-64607","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

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.

CWE-772

https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q

[{"vendor":"Apache Software Foundation","product":"Apache HttpComponents Client","defaultStatus":"unaffected","collectionURL":"https://repo.maven.apache.org/maven2/","packageName":"org.apache.httpcomponents.client5:httpclient5","versions":[{"version":"5.0-alpha","lessThanOrEqual":"5.6.2","versionType":"semver","status":"affected"}]}]