Apache HttpClient accepts SCRAM-SHA-256 authentication without proper mutual authentication verification
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-40542US | — | — | ||
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… | ||||
02
references
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2026/04/22/5WEB
- https://github.com/apache/httpcomponents-clientPACKAGE
- https://github.com/apache/httpcomponents-client/commit/726eac2323d370435d8afca1e0540aa099927f18WEB
- https://lists.apache.org/thread/tfmgv86xr0z1y096vs3z0y315t1v3o97WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-40542ADVISORY
scry
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