CVE-2026-34873

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.1 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N                                    

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.

Published Date

April 01, 2026

Last Modified

April 07, 2026

CWE ID

CWE-287

Source

NVD

Vendor

arm

Product

mbed_tls