CVE-2025-15346

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Source
https://cve.org/CVERecord?id=CVE-2025-15346
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-15346.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-15346
Aliases
Downstream
Published
2026-01-07T23:32:11Z
Modified
2026-08-12T03:51:42Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/AU:Y CVSS Calculator
Summary
wolfSSL Python library `CERT_REQUIRED` mode fails to enforce client certificate requirement
Details

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.

Database specific 
{
    "cna_assigner": "wolfSSL",
    "cwe_ids": [
        "CWE-287",
        "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/15xxx/CVE-2025-15346.json"
}
References

Affected packages

Git / github.com/wolfssl/wolfssl-py

Affected ranges

Type
GIT
Repo
https://github.com/wolfssl/wolfssl-py
Events
Introduced
53b49d867febb295c3ccca821c4a95edd8269060
Fixed
b4517dece79f682a8f453abce5cfc0b81bae769d
Fixed
05433e92b6faa37bd584d28f1a898c97cfccb20d
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "5.3.0"
        },
        {
            "last_affected": "5.8.2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v5.*
v5.3.0-stable
v5.4.0-stable
v5.5.3-stable
v5.5.4
v5.6.0-stable
v5.6.6-stable
v5.7.2-stable
v5.8.2-stable

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-15346.json"