CVE-2025-61727 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
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

History

Wed, 03 Dec 2025 22:15:00 +0000

Type	Values Removed	Values Added
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 03 Dec 2025 19:45:00 +0000

Type	Values Removed	Values Added
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.
Title		Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509
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

MITRE

Status: PUBLISHED

Assigner: Go

Published: 2025-12-03T19:37:15.054Z

Updated: 2025-12-03T22:06:17.007Z

Reserved: 2025-09-30T15:05:03.605Z

Link: CVE-2025-61727

Vulnrichment

Updated: 2025-12-03T21:45:44.520Z

NVD

Status : Received

Published: 2025-12-03T20:16:25.607

Modified: 2025-12-03T22:15:51.510

Link: CVE-2025-61727

Redhat

No data.

OpenCVE Enrichment

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