data/reports/GO-2026-4339.yaml

id: GO-2026-4339
modules:
    - module: cmd
      versions:
        - fixed: 1.24.12
        - introduced: 1.25.0
        - fixed: 1.25.6
      vulnerable_at: 1.25.5
      packages:
        - package: cmd/go
summary: Arbitrary file write using cgo pkg-config directive in cmd/go
description: |-
    Building a malicious file with cmd/go can cause can cause a write
    to an attacker-controlled file with partial control of the file content.

    The "#cgo pkg-config:" directive in a Go source file provides command-line
    arguments to provide to the Go pkg-config command. An attacker can
    provide a "--log-file" argument to this directive, causing pkg-config
    to write to an attacker-controlled location.
cves:
    - CVE-2025-61731
credits:
    - RyotaK (https://ryotak.net) of GMO Flatt Security Inc.
references:
    - fix: https://go.dev/cl/736711
    - report: https://go.dev/issue/77100
    - web: https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
cve_metadata:
    id: CVE-2025-61731
    cwe: 'CWE-78: Improper Neutralization of Special Elements used in an OS Command (''OS Command Injection'')'
source:
    id: go-security-team
    created: 2026-01-20T15:59:29.798178-08:00
review_status: REVIEWED