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wolfssl

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Critical, CVSS 9.3PyPIAmendedPublished

    wolfSSL Python module vulnerable to Improper Authentication

    CVE-2025-15346 · GHSA-vj87-jj27-4h9c

    Affected
    • PyPI wolfssl < 5.8.4.post0
    Fixed in
    5.8.4.post0· Vendor fix available
    Issue
    A vulnerability in the handling of verifymode = CERTREQUIRED in the wolfssl Python package (wolfssl-py) causes client certificate requirements to not be fully enforced. Because the WOLFSSLVERIFYFAILIFNOPEERCERT flag was not included, the behavior effectively matched CERTOPTIONAL: 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.

    Recommended action: Upgrade to 5.8.4.post0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:osv.dev (1)github.com (2)Source checked Evidence →