High7.3Apache Software Foundation
Apache HttpClient: Missing critical step in authentication in Apache HttpClient 5.6 allows an attacker to cause the client to accept SCR…
CVE-2026-40542 Published Apr 22, 2026Updated by vendor Jun 30, 2026
CVE-2026-40542
Affected products & platforms
Apache Software FoundationUnclassified
Summary
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.
Mitigation
Mitigation steps weren't captured by the parser for this advisory — this is a parsing gap, not a statement that no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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