CVE-2025-61727

🔶 medium

Summary

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 Score

6.5

Medium

EPSS Score

0.0

Exploit Probability

Published Date

2025-12-03

First Seen: 2026-01-05

Last Modified 2025-12-18

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE IDs (Weakness Types)

CWE-295

🔗 References 4

https://go.dev/cl/723900

Patch

https://go.dev/issue/76442

Issue Tracking

https://groups.google.com/g/golang-announce/c/8FJoBk...

Mailing List Release Notes

https://pkg.go.dev/vuln/GO-2025-4175

Vendor Advisory

📦 Affected Products 2

Vendor	Product	Status	Affected Versions
golang	go	Affected	< 1.24.11
golang	go	Affected	≥ 1.25 < 1.25.5

🔗 Related CVEs 6

CVE ID	Severity	CVSS	Summary	Published
CVE-2025-61726	⚠️ high	7.5	The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query p...	2026-01-28
CVE-2025-61728	🔶 medium	6.5	archive/zip uses a super-linear file name indexing algorithm that is invoked the first time a file in an archive is open...	2026-01-28
CVE-2025-61730	🔶 medium	5.3	During the TLS 1.3 handshake if multiple messages are sent in records that span encryption level boundaries (for instanc...	2026-01-28
CVE-2025-61731	⚠️ high	7.8	Building a malicious file with cmd/go can cause can cause a write to an attacker-controlled file with partial control of...	2026-01-28
CVE-2025-68119	⚠️ high	7.0	Downloading and building modules with malicious version strings can cause local code execution. On systems with Mercuria...	2026-01-28
CVE-2025-61729	⚠️ high	7.5	Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be p...	2025-12-02

These CVEs affect the same products