CVE-2026-64607 — MEDIUM (5.3)

Vulnerability 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.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

LOW

Related Weaknesses (CWE)

CWE-772

References

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

FAQ

What is CVE-2026-64607?

CVE-2026-64607 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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...

How severe is CVE-2026-64607?

CVE-2026-64607 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-64607?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.