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CVE-2025-61727

Good to know:

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Date: December 3, 2025

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.

Severity Score

Related Resources (6)

https://pkg.go.dev/vuln/GO-2025-4175
https://nvd.nist.gov/vuln/detail/CVE-2025-61727
https://go.dev/issue/76442
https://go.dev/cl/723900
https://groups.google.com/g/golang-announce/c/8FJoBkPddm4
https://www.mend.io/vulnerability-database/CVE-2025-61727

Severity Score

Top Fix

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Upgrade Version

Upgrade to version github.com/golang/go - go1.24.11;https://github.com/golang/go.git - go1.24.11;https://github.com/golang/go.git - go1.25.5

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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