CVE•Published 2026-07-31•Modified 2026-08-13•0 articles on news•5 live references•NVD data

CVE-2026-64607Apache · Httpclient

Vulnerability data via NVD (ingested)

CVSS v3.1

5.3

MEDIUM

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

EPSS percentile

Exploit Prediction Scoring System · top 85% of all CVEs

Weaknesses (CWE)

CWE-772Missing Release of Resource after Effective Lifetime

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.

Timeline

Published 2026-07-31

Modified 2026-08-13

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-64607

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Apache Httpclient"

All exposed Apache Httpclient instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Httpclient"

HTTP body or banner mentions "Httpclient" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-64607