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CVE-2026-40542

Published: Apr 22, 2026

Modified: Apr 22, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
Apache Software Foundation	Apache HttpClient	affected `5.6 - < 5.6.1`

Weaknesses (CWE)

References

https://lists.apache.org/thread/tfmgv86xr0z1y096vs3z0y315t1v3o97

vendor-advisory

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