CVE-2026-2645
wolfSSL vulnerability analysis and mitigation

In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 (wolfSSL 5.8.2 and earlier is vulnerable, 5.8.4 is not vulnerable). In 5.8.4 wolfSSL would detect the issue later in the handshake. 5.9.0 was further hardened to catch the issue earlier in the handshake.


SourceNVD

Related wolfSSL vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-5500HIGH8.7
  • wolfSSLwolfSSL
  • wolfssl
NoNoApr 10, 2026
CVE-2026-5501HIGH8.6
  • wolfSSLwolfSSL
  • wolfssl
NoNoApr 10, 2026
CVE-2026-5477HIGH8.2
  • wolfSSLwolfSSL
  • wolfssl
NoNoApr 10, 2026
CVE-2026-5479HIGH7.6
  • wolfSSLwolfSSL
  • wolfssl
NoYesApr 10, 2026
CVE-2026-5466HIGH7.6
  • wolfSSLwolfSSL
  • cpe:2.3:a:wolfssl:wolfssl
NoYesApr 10, 2026

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