Vulnerability DatabaseCVE-2026-64607
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CVE-2026-64607
Published:July 31, 2026
Updated:August 04, 2026
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.
Affected Packages
org.apache.httpcomponents.client5:httpclient5 (JAVA):
Affected version(s) >=5.0-alpha1 <5.6.3
Fix Suggestion:
Update to version 5.6.3
Related Resources (1)
https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Missing Release of Resource after Effective Lifetime
CWE-772
EPSS
Base Score:
0.24