CVE-2026-71290

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.

Database specific

{
    "cwe_ids": [
        "CWE-295"
    ],
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "5.4-alpha"
                },
                {
                    "last_affected": "5.6.3"
                }
            ]
        }
    ],
    "cna_assigner": "apache",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71290.json"
}

References

Affected packages

Git / github.com/apache/httpcomponents-client

Affected ranges

Type

GIT

Repo

https://github.com/apache/httpcomponents-client

Events

Introduced

84cccfe6300bca6b37abd05af527df08a781b677

Fixed

36508cead5c4388d04d20aa7efad5a68595631a0

Database specific

Show details

{
    "cpe": "cpe:2.3:a:apache:httpclient:*:*:*:*:*:*:*:*",
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "5.4"
        },
        {
            "fixed": "5.6.4"
        }
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71290.json"