CVE-2026-3230
LOWImproper key_share validation in TLS 1.3 HelloRetryRequest
Title source: cnaDescription
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
Core References
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