CVE-2026-40542

httpclient: Apache HttpClient: Authentication bypass due to missing mutual authentication verification

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Severity

Important

Red Hat Product Security

7.3

CVSS 3.1

Review impact separately from score.

Published · April 22, 2026

Updated · November 5, 2026

Description

A flaw was found in Apache HttpClient. This vulnerability allows a remote attacker to bypass a critical step in the SCRAM-SHA-256 authentication process. By exploiting this, an attacker can trick the client into accepting authentication without proper mutual verification, potentially compromising the confidentiality and integrity of data.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CWE-325 · Missing Cryptographic Step