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.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://go.dev/cl/723900 Patch
- https://pkg.go.dev/vuln/GO-2025-4175 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.5 · golangNVD modified 2026-10-18 17:10
Affected (CPE criteria) 1
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
References 4
- https://go.dev/cl/723900 Patch
- https://go.dev/issue/76442 Issue Tracking
- https://groups.google.com/g/golang-announce/c/8FJoBkPddm4 Mailing List, Release Notes
- https://pkg.go.dev/vuln/GO-2025-4175 Vendor Advisory