Vulnerability Description
A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced. Because the WOLFSSL_VERIFY_FAIL_IF_NO_PEER_CERT flag was not included, the behavior effectively matched CERT_OPTIONAL: a peer certificate was verified if presented, but connections were incorrectly authenticated when no client certificate was provided. This results in improper authentication, allowing attackers to bypass mutual TLS (mTLS) client authentication by omitting a client certificate during the TLS handshake. The issue affects versions up to and including 5.8.2.
Related Weaknesses (CWE)
References
- https://github.com/wolfSSL/wolfssl-py/commit/b4517dece79f682a8f453abce5cfc0b81ba
- https://github.com/wolfSSL/wolfssl-py/pull/62
- https://github.com/wolfSSL/wolfssl-py/releases/tag/v5.8.4-stable
FAQ
What is CVE-2025-15346?
CVE-2025-15346 is a documented vulnerability. A vulnerability in the handling of verify_mode = CERT_REQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced. Because the WOLFSSL_VERIFY_...
How severe is CVE-2025-15346?
CVSS scoring is not yet available for CVE-2025-15346. Check NVD for updates.
Is there a patch for CVE-2025-15346?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.