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6.5 Medium

CVE-2025-61727 An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf…

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.

Affected products and versions

Product Affected versions Fixed in
crypto/x509 1.25 1.25.0 → < 1.25.5 1.25.5
crypto/x509 1.24 earliest → < 1.24.11 1.24.11

References

Timeline

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The 15 CVEs of crypto/x509 →
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