What’s Vulnerable › Vulnerabilities

CVE-2022-25638

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-02-24 · updated 2026-06-17
• Weakness: CWE-295

Description

In wolfSSL before 5.2.0, certificate validation may be bypassed during attempted authentication by a TLS 1.3 client to a TLS 1.3 server. This occurs when the sig_algo field differs between the certificate_verify message and the certificate message.

Affected products

• wolfSSL: before 5.2.0 — fixed in 5.2.0

How to fix

Upgrade to a fixed version: wolfSSL 5.2.0. Check the vendor advisory for mitigations.

References

• https://github.com/wolfSSL/wolfssl/pull/4813
• https://www.wolfssl.com/docs/security-vulnerabilities/
• https://github.com/wolfSSL/wolfssl/pull/4813
• https://www.wolfssl.com/docs/security-vulnerabilities/

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