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.
References (4)
Core 4
Core References
Patch
https://go.dev/cl/736711
Issue Tracking
https://go.dev/issue/77100
Release Notes, Mailing List
https://groups.google.com/g/golang-announce/c/Vd2tYVM8eUc
Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4339
Scores
CVSS v3
7.8
EPSS
0.0001
EPSS Percentile
1.3%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
Status
published
Products (1)
golang/go
< 1.24.12
Published
Jan 28, 2026
Tracked Since
Feb 18, 2026