GO-2026-6858
- Source
- https://pkg.go.dev/vuln/GO-2026-6858
- Import Source
- https://vuln.go.dev/ID/GO-2026-6858.json
- JSON Data
- https://api.osv.dev/v1/vulns/GO-2026-6858
- Aliases
-
- CVE-2026-97033
- Published
- 2026-11-11T02:51:11Z
- Modified
- 2026-11-11T03:15:14Z
- Summary
- Unexpected code execution via --sysroot, -target, -isysroot, -Wl,-syslibroot, and -x cgo flags in cmd/go
- Details
-
Building a malicious package that uses cgo could cause arbitrary code execution at build time through several compiler and linker flags permitted in "#cgo" directives.
Specifically, "--sysroot" in GCC and Clang relocates compiler subprograms, spec files, and CRT startup objects to an attacker-controlled directory; "-target" in Clang falls back to executing target helper tools from the current working directory when not found in PATH; "-isysroot" and "-Wl,-syslibroot" can pass a regular file on disk to GNU ld.bfd, which interprets it as a positional linker script; and "-x" permitted specifying arbitrary compiler input languages beyond those supported by cgo.
"--sysroot" and "-target" are now disallowed in "#cgo" flags, "-isysroot" and "-Wl,-syslibroot" are verified not to point to regular files, and "-x" is restricted to the C, C++, Objective-C, and assembler languages supported by cgo.
- Database specific
{ "review_status": "REVIEWED", "url": "https://pkg.go.dev/vuln/GO-2026-6858" }- References
Affected packages
Go / toolchain
Package
- Name
- toolchain
- View open source insights on deps.dev
- Purl
- pkg:golang/toolchain