CVE-2026-3230

LOW

Improper key_share validation in TLS 1.3 HelloRetryRequest

Title source: cna
STIX 2.1

Description

Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.

References (1)

Core 1

Scores

CVSS v3 2.7
EPSS 0.0021
EPSS Percentile 11.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-20
Status published
Products (2)
wolfSSL/wolfSSL < 5.9.0
wolfssl/wolfssl < 5.9.0
Published Mar 19, 2026
Tracked Since Mar 20, 2026