9.1Critical
CVE-2026-34873
Description
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.
Weakness (CWE):
CWE-287
Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.
Affected products and versions
| Vendor | Product | Versions | |
|---|---|---|---|
| trustedfirmware | mbed tls | 3.5.0 – < 3.6.6 |
References and patches
CPE matches (NVD) (2)
cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*≥ 3.5.0 < 3.6.6cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*≥ 4.0.0 < 4.1.0