{"cve":"CVE-2025-61727","nvd":{"published":"2025-12-03T20:16:25.607","modified":"2026-10-18T17:10:00.110","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-295"],"references":["https://go.dev/cl/723900","https://go.dev/issue/76442","https://groups.google.com/g/golang-announce/c/8FJoBkPddm4","https://pkg.go.dev/vuln/GO-2025-4175"],"products":["golang:go"],"source":"nvd","synced_at":"2026-10-19T22:16:40.427100871+00:00"},"epss":{"cve":"CVE-2025-61727","score":0.00284,"percentile":0.20687,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GO-2025-4175","url":"https://osv.dev/vulnerability/GO-2025-4175","summary":"Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509","modified":"2026-05-15T10:59:24.063040444Z","packages":[{"ecosystem":"Go","name":"stdlib","purl":"pkg:golang/stdlib","ranges":["<1.24.11",">=1.25.0 <1.25.5"],"fixed":["1.24.11","1.25.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}