Vulnerability/
REDHAT-BUG-2456335

REDHAT-BUG-2456335

Published Apr 8, 2026

Updated

When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.

Affected Software

1 affected component

go Go crypto/x509

Event History

Apr 8, 2026

Data Sourced

via Red Hat·02:01 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What is the severity of REDHAT-BUG-2456335?

The severity of REDHAT-BUG-2456335 is considered moderate due to the impact on certificate validation processes.

How do I fix REDHAT-BUG-2456335?

To fix REDHAT-BUG-2456335, ensure you update the Go crypto/x509 library to the latest version that addresses this issue.

Who is affected by REDHAT-BUG-2456335?

Users and organizations utilizing the Go crypto/x509 library for certificate validation are affected by REDHAT-BUG-2456335.

What are the implications of REDHAT-BUG-2456335?

The implications of REDHAT-BUG-2456335 include potential failures in validating wildcard DNS certificates, which may bypass security constraints.

When was REDHAT-BUG-2456335 reported?

REDHAT-BUG-2456335 was reported in the Red Hat bug tracking system and is documented for remediation.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co

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