CVE-2026-40542
7.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache HttpClient | 5.6 < 5.6.1 | affected |
Weaknesses
- CWE-304: CWE-304: Missing Critical Step in Authentication
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
CVE Program Container
Additional References
httpclient: Apache HttpClient: Authentication bypass due to missing mutual authentication verification
Additional References
- https://access.redhat.com/security/cve/CVE-2026-40542
- https://bugzilla.redhat.com/show_bug.cgi?id=2460518
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40542.json
References
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