CVE-2025-61729

Dec. 19, 2025, 6:25 p.m.

7.5
High

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.

Product(s) Impacted

Vendor Product Versions
Golang
  • Go
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-295
Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a golang go / / / / / / / /
a golang go / / / / / / / /

References

https://go.dev/cl/725920
https://go.dev/issue/76445
https://groups.google.com/g/golang-announce/c/8FJoBkPddm4
https://pkg.go.dev/vuln/GO-2025-4155

Tags

CWE-295
security@golang.org
2025-12-02
CVE-2025-61729

CVSS Score

7.5 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: LOW
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH

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

    View Vector String

Timeline

Published: Dec. 2, 2025, 7:15 p.m.
Last Modified: Dec. 19, 2025, 6:25 p.m.

Status : Analyzed

CVE has had analysis completed and all data associations made.

More info

Source

security@golang.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.