CVE•Published 2026-08-11•Modified 2026-09-24•1 article on news•4 live references•NVD data

CVE-2026-71290Apache · Httpclient

Vulnerability data via NVD (ingested)

CVSS v3.1

9.1

CRITICAL

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

EPSS percentile

Exploit Prediction Scoring System · top 84% of all CVEs

Weaknesses (CWE)

CWE-295Improper Certificate Validation

Description

Improper TLS hostname verification vulnerability in Apache HttpComponents Client 5.4 or newer. HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient. An attacker that can intercept and modify traffic between the client and the server can impersonate the server by presenting a valid certificate for a different domain. Please note the classic version of HttpClient is not affected by this vulnerability. Affected users are recommended to upgrade to at least version 5.6.4, which fixes the issue.

Timeline

Published 2026-08-11

Modified 2026-09-24

External references

NVD MITRE Exploit-DB 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-2026-71290

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-2026-71290