Detections
Analytics
Golang 1.25.x < 1.25.11 / 1.26.x < 1.26.4 Multiple Vulnerabilities
high Nessus Plugin ID 318618
Synopsis
An application installed on the remote host is affected by multiple vulnerabilities.Description
The version of Golang running on the remote host is 1.25.x prior to 1.25.11, or 1.26.x prior to 1.26.4. It is, therefore, affected by multiple vulnerabilities:- (*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates. (CVE-2026-27145)
- Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU.
(CVE-2026-42504)
- When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.
(CVE-2026-42507)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Golang Go version 1.25.11, 1.26.4 or later.See Also
Plugin Details
Severity: High
ID: 318618
File Name: golang_1_25_11_1_26_4.nasl
Version: 1.1
Type: Local
Agent: windows, macosx, unix
Family: Misc.
Published: 6/4/2026
Updated: 6/4/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.0
CVSS v2
Risk Factor: High
Base Score: 8.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:C
CVSS Score Source: CVE-2026-27145
CVSS v3
Risk Factor: High
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Score Source: CVE-2026-42504
Vulnerability Information
CPE: cpe:/a:golang:go
Required KB Items: installed_sw/Golang Go Programming Language
Patch Publication Date: 6/2/2026
Vulnerability Publication Date: 6/2/2026