CVE-2026-64607

medium Apache
CVSS v3 Base Score
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS Score
0.3%
Exploitation probability in 30 days
Top 74% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Published: July 31, 2026 (37 days ago)
Last Modified: August 13, 2026
Vendor: Apache
Source: NVD

Description

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

CWE-772

Affected Products

apache httpclient

References

🔗 lists.apache.org 🔗 www.openwall.com