Apache HttpComponents Client: TLS hostname verification silently disabled on the async transport (default config, MITM)
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.
CVE-2026-71290
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-71290
Apache HttpComponents Client
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Apache Software Foundation",
"product": "Apache HttpComponents Client",
"versions": [
{
"status": "affected",
"version": "5.4-alpha",
"versionType": "semver",
"lessThanOrEqual": "5.6.3"
}
],
"packageName": "org.apache.httpcomponents.client5:httpclient5",
"collectionURL": "https://repo.maven.apache.org/maven2/",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-71290
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #510 · Revision 1
- Added to Heist Feed
- Publisher date