CVE-2026-64607

MEDIUM
MEDIUM Priority: 0.02 BB Relevance: 71/100
Published: 2026-07-31 Modified: 2026-10-23 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: Low

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
apache httpclient 5.0.0 – 5.6.3

Bug Bounty Relevance

71 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

5.3 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS — Exploitation Probability

0.46%
Raw Score 0.004640
Percentile 40.2%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00464
2026-10-28
0.00464

Intelligence Sources

nvd ref →