What is CVE-2025-15346?

CVE-2025-15346 is a critical-severity improper authentication vulnerability in wolfssl (pip), affecting versions < 5.8.4.post0. It is fixed in 5.8.4.post0. The application does not adequately verify the identity of a user, device, or process before granting access.

Which versions of wolfssl are affected by CVE-2025-15346?

wolfssl (pip) versions < 5.8.4.post0 is affected.

Is there a fix for CVE-2025-15346?

Yes. CVE-2025-15346 is fixed in 5.8.4.post0. Upgrade to this version or later.

Is CVE-2025-15346 exploitable, and should I be worried?

Whether CVE-2025-15346 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

What actually determines whether CVE-2025-15346 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

CVE-2025-15346 in wolfssl

Q: Which versions of wolfssl are affected by CVE-2025-15346?

wolfssl (pip) versions < 5.8.4.post0 is affected.

Q: Is there a fix for CVE-2025-15346?

Yes. CVE-2025-15346 is fixed in 5.8.4.post0. Upgrade to this version or later.

Q: Is CVE-2025-15346 exploitable, and should I be worried?

Whether CVE-2025-15346 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk.

Q: What actually determines whether CVE-2025-15346 is exploitable, and how bad it is?

Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.

Q: How do I fix CVE-2025-15346?

Upgrade wolfssl to 5.8.4.post0 or later.

Summary

wolfSSL Python module vulnerable to Improper Authentication

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.

Impact

The application does not adequately verify the identity of a user, device, or process before granting access. Typical impact: unauthorized access to functions or data reserved for authenticated parties.

Affected versions

wolfssl (< 5.8.4.post0)

Security releases

wolfssl → 5.8.4.post0 (pip)

Kodem intelligence

Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.

Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.

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Remediation advice

Upgrade wolfssl to 5.8.4.post0 or later to resolve this vulnerability.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2025-15346? CVE-2025-15346 is a critical-severity improper authentication vulnerability in wolfssl (pip), affecting versions < 5.8.4.post0. It is fixed in 5.8.4.post0. The application does not adequately verify the identity of a user, device, or process before granting access.
Which versions of wolfssl are affected by CVE-2025-15346? wolfssl (pip) versions < 5.8.4.post0 is affected.
Is there a fix for CVE-2025-15346? Yes. CVE-2025-15346 is fixed in 5.8.4.post0. Upgrade to this version or later.
Is CVE-2025-15346 exploitable, and should I be worried? Whether CVE-2025-15346 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
What actually determines whether CVE-2025-15346 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
How do I fix CVE-2025-15346? Upgrade wolfssl to 5.8.4.post0 or later.