Riskcovery

CVE-2026-40542

Apache HttpClient: SCRAM-SHA-256 mutual authentication bypass may cause the client to accept authentication without proper mutual authentication verification

State
Published
Severity
7.3 High
Published
Apr 22, 2026
Updated
Sep 9, 2026
Reserved
Apr 14, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:LCISA-ADP
3.17.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lredhat-SADP

Weaknesses

  • CWE-304 Missing Critical Step in Authentication
  • CWE-325 Missing Cryptographic Step

Affected Products

ProductVersions
Apache HttpClientApache Software Foundation
  • 5.6 to before 5.6.1Affected

References

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