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Status published
Unknown
CVE-2025-61727
Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509
Vulnerability Description
An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
Go standard library
View all reports →Affected Software
crypto/x509
Vulnerable Versions:
0, 1.25.0
Timeline
Official Publish:
December 3rd, 2025
Last Modified:
December 3rd, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
No vector data available
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.