Vulnerability Details CVE-2026-40542
Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCRAM-SHA-256 authentication without proper mutual authentication verification. Users are recommended to upgrade to version 5.6.1, which fixes this issue.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 24.8%
CVSS Severity
CVSS v3 Score 7.3
References
Products affected by CVE-2026-40542
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cpe:2.3:a:apache:httpclient:5.6