Bug 2449222 (CVE-2026-3230)

Summary: CVE-2026-3230 wolfssl: wolfSSL: Confidentiality compromise via missing cryptographic step in TLS 1.3 HelloRetryRequest handshake
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in wolfSSL. A remote attacker could exploit a missing cryptographic step in the Transport Layer Security (TLS) 1.3 client HelloRetryRequest handshake logic. By sending a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, an attacker could cause the derivation of predictable traffic secrets from the (Elliptic Curve) Diffie-Hellman Ephemeral ((EC)DHE) shared secret. This could lead to a compromise in the confidentiality of TLS-protected communications.
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Description OSIDB Bzimport 2026-03-19 22:02:16 UTC 
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.