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CVE-2026-40542

Medium

Elevated severity or exploit probability.

CVSS base
7.3 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS — probability of exploitation (30 days)
0.7%
51.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-325
Published 2026-04-22 · modified 2026-09-09

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.

Affected

apache

References

Official: NVD · CVE.org