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Critical Apache HttpComponents Flaw Allows Server Impersonation in MITM Attacks

Cyber Press
Cyber Press
Published August 19, 2026Original Report

Excerpt

A critical vulnerability in Apache HttpComponents Client could allow attackers to impersonate trusted servers during man-in-the-middle (MITM) attacks when applications use the asynchronous HttpClient implementation. Tracked as CVE-2026-71290, the issue stems from improper TLS hostname verification in Apache HttpComponents Client versions 5.4 through 5.6.3. The vulnerability affects applications configured with HostnameVerificationPolicy#BUILTIN while using the async version…

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Indicators of Compromise

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1 indicators

TypeIndicatorConfidenceScoreFirst Seen
CVECVE-2026-71290MediumScore 51/100First seen

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