CVE-2026-34872 in mbed TLS

Sumário (Inglês)

An issue was discovered in Mbed TLS 3.5.x and 3.6.x through 3.6.5 and TF-PSA-Crypto 1.0. There is a lack of contributory behavior in FFDH due to improper input validation. Using finite-field Diffie-Hellman, the other party can force the shared secret into a small set of values (lack of contributory behavior). This is a problem for protocols that depend on contributory behavior (which is not the case for TLS). The attack can be carried by the peer, or depending on the protocol by an active network attacker (person in the middle).

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Responsável

MITRE

Reservar

31/03/2026

Divulgação

01/04/2026

Estado

Confirmado

Inscrições

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidade	CWE	Exp	Con	CVE
354757	mbed TLS FFDH Encriptação fraca	331	Não definido	Não definido	CVE-2026-34872

Fontes

• MITRE
• NVD
• CVE Details