CVE-2025-61729

7.5 HIGH
Published: December 02, 2025 Modified: December 19, 2025

Description

Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://go.dev/cl/725920
Source: security@golang.org
Patch
https://go.dev/issue/76445
Source: security@golang.org
Issue Tracking Patch
https://groups.google.com/g/golang-announce/c/8FJoBkPddm4
Source: security@golang.org
Mailing List Release Notes
https://pkg.go.dev/vuln/GO-2025-4155
Source: security@golang.org
Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.0%
2th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

golang