🛡️ CVE-2025-15346
🔴 CVSS 9.5 — Critical ✅ No Known Exploit CWE-287 NVD
9.5
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity Critical
CVSS Score 9.5
CVSS Vector N/A
CWE CWE-287
Public Exploit ✅ No
Source NVD
Published 2026-01-08
Updated 2026-06-02
Modified 2026-04-15
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown
wolfssl 5.8.4.post0

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