CVE-2026-71290
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
Improper TLS hostname verification in Apache HttpComponents Client 5.4 or newer. The HostnameVerificationPolicy#BUILTIN setting has no effect when used with the async version of HttpClient. An attacker who can intercept and modify traffic can impersonate the server by presenting a valid certificate for a different domain. The classic version is not affected. Upgrade to at least 5.6.4 is recommended.
Risk Assessment
The risk includes man-in-the-middle attacks, which could lead to interception of sensitive data or unauthorized access to systems.
Recommendation
It is recommended to upgrade Apache HttpComponents Client to at least version 5.6.4, which fixes the issue.
Original NVD description (English source)
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.