CVE-2026-3230
Improper key_share validation in TLS 1.3 HelloRetryRequest
CVSS Score
0.0
EPSS Score
0.1%
EPSS Percentile
26th
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.
| CWE | CWE-20 |
| Vendor | wolfssl |
| Product | wolfssl |
| Published | Mar 19, 2026 |
| Last Updated | Mar 20, 2026 |
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Affected Versions
wolfSSL / wolfSSL
0 < 5.9.0
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH) Kyungmin Bae, Pohang University of Science and Technology (POSTECH)