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CVE

GHSA-vj87-jj27-4h9c

wolfSSL Python module vulnerable to Improper Authentication
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CVE

GHSA-vj87-jj27-4h9c

wolfSSL Python module vulnerable to Improper Authentication

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 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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.3
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
9.1
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-15346, https://github.com/wolfSSL/wolfssl-py/pull/62, https://github.com/wolfSSL/wolfssl-py/commit/b4517dece79f682a8f453abce5cfc0b81bae769d, https://github.com/wolfSSL/wolfssl-py, https://github.com/wolfSSL/wolfssl-py/releases/tag/v5.8.4-stable

Severity

9.1

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.1
EPSS Probability
0.00057%
EPSS Percentile
0.18148%
Introduced Version
0,0.1.0
Fix Available
5.8.4-stable,5.8.4.post0

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