๐Ÿ›ก๏ธ CVE-2026-34872
๐Ÿ”ด CVSS 9.1 โ€” Critical โœ… No Known Exploit CWE-347 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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).

Details

Severity CRITICAL
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-347
Public Exploit โœ… No
Source NVD
Published 2026-04-01
Updated 2026-06-02
Modified 2026-04-03
Fix URL N/A

Affected Packages

Software From version Fixed in
mbed-tls โ€” 3.6.6
tf-psa-crypto โ€” โ€”

Similar Threats

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