CVE-2026-64607

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://lists.apache.org/thread/qqfzo3fqcdk4l5496vz95ppvl4ty511q	Mailing List Release Notes
http://www.openwall.com/lists/oss-security/2026/08/13/5

Configurations

Configuration 1 (hide)

cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*

History

23 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) HttpClient basado en el modelo de E/S clásico no logra liberar correctamente la conexión subyacente de vuelta al gestor de conexiones si encuentra un valor de encabezado ’Content-Encoding’ inválido o no compatible en el mensaje de respuesta. Tenga en cuenta que este defecto no afecta a HttpClient basado en el modelo de E/S asíncrono. Este problema afecta a Apache HttpComponents Client: desde 5.0-alpha1 hasta 5.6.2.

Information

Published : 2026-07-31 11:17

Updated : 2026-10-23 23:10

NVD link : CVE-2026-64607

Mitre link : CVE-2026-64607

CVE.ORG link : CVE-2026-64607

JSON object : View

Products Affected

apache

httpclient

CWE

CWE-772

Missing Release of Resource after Effective Lifetime

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