Golang 1.25.x < 1.25.12 / 1.26.x < 1.26.5 Multiple Vulnerabilities

high Nessus Plugin ID 327411

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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 1.25.12 or 1.26.x prior to 1.26.5. It is, therefore, affected by multiple vulnerabilities:

- On Unix systems, opening a file in an os.Root improperly follows symlinks to locations outside of the Root when the final path component of a path is a symbolic link and the path ends in a slash. (CVE-2026-39822)

- Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello. (CVE-2026-42505)

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 1.25.12, 1.26.5, or later.

Plugin Details

Severity: High

ID: 327411

File Name: golang_1_26_5.nasl

Version: 1.3

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 7/16/2026

Updated: 7/17/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.7

Percentile: 99.03

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-39822

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:golang:go

Required KB Items: installed_sw/Golang Go Programming Language

Exploit Ease: No known exploits are available

Patch Publication Date: 7/7/2026

Vulnerability Publication Date: 7/7/2026

Reference Information

CVE: CVE-2026-39822, CVE-2026-42505

IAVB: 2026-B-0193

Detections

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