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CVE-2026-27137

Incorrect enforcement of email constraints in crypto/x509 PUBLISHED

Description (CNA)

When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.

Affected (CNA)

Vendor / productVersions
Go standard library / crypto/x509affected 1.26.0-0 before 1.26.1

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A certificate validation flaw has been discovered in the golang crypto/x509 module. When verifying a certificate chain which contains a certificate containing multiple email address constraints which share common local portions but different domain portions, these constraints will not be properly applied, and only the last constraint will be considered.