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High severity8.2NVD Advisory· Published Apr 8, 2026· Updated Apr 20, 2026

CVE-2026-33810

CVE-2026-33810

Description

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.

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Affected products

338

Patches

Vulnerability mechanics

References

6

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