Missing Critical Step in Authentication Affecting org.apache.httpcomponents.client5:httpclient5 package, versions [5.6-alpha1,5.6.1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published23 Apr 2026
- disclosed23 Apr 2026
- creditRasmus Moorats
Introduced: 23 Apr 2026
CVE-2026-40542 (opens in a new tab)How to fix?
Upgrade org.apache.httpcomponents.client5:httpclient5 to version 5.6.1 or higher.
Overview
org.apache.httpcomponents.client5:httpclient5 is a HttpClient component of the Apache HttpComponents project.
Affected versions of this package are vulnerable to Missing Critical Step in Authentication in the AuthenticationHandler's handleResponse() method. The client may accept SCRAM-SHA-256 authentication by default, without mutual verification.