AIKIDO-2026-10647
httpclient5 is vulnerable to Missing Critical Step in Authentication
75
High Risk
This Affects:
httpclient5TL;DR
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.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range.
Background info
httpclient5 is vulnerable to Missing Critical Step in Authentication in versions 5.6 - 5.6.
How to fix this
Upgrade the org.apache.httpcomponents.client5:httpclient5 library to a patch version.
Links
github.com/apache/httpcomponents-client/compare/rel/v5.6...rel/v5.6.1
lists.apache.org/thread/tfmgv86xr0z1y096vs3z0y315t1v3o97openwall.com/lists/oss-security/2026/04/22/5access.redhat.com/errata/RHSA-2026:60239access.redhat.com/errata/RHSA-2026:60246access.redhat.com/errata/RHSA-2026:60247access.redhat.com/errata/RHSA-2026:60248access.redhat.com/errata/RHSA-2026:60249access.redhat.com/errata/RHSA-2026:60250access.redhat.com/errata/RHSA-2026:60251access.redhat.com/errata/RHSA-2026:60252access.redhat.com/errata/RHSA-2026:60254access.redhat.com/errata/RHSA-2026:60256access.redhat.com/errata/RHSA-2026:60259access.redhat.com/security/cve/CVE-2026-40542bugzilla.redhat.com/show_bug.cgi?id=2460518security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40542.json
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SOC 2Compliant
ISO 27001Compliant