CVE-2026-34873: Critical severity TrustedFirmware Mbed Tls vulnerability
Published Apr 1, 2026
·Updated
An issue was discovered in Mbed TLS 3.5.0 through 4.0.0. Client impersonation can occur while resuming a TLS 1.3 session.
Affected Software
2 affected components
TrustedFirmware Mbed Tls>=3.5.0<3.6.6
TrustedFirmware Mbed Tls>=4.0.0<4.1.0
Event History
Apr 1, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software