Unscored

CVE-2026-97036Arbitrary code execution during build on darwin via "-l to_library" in cgo in cmd/go

Go toolchain cmd/go Published: 2026-11-11 06:13 (12 hours ago)

Description

On Darwin, building a malicious package that uses cgo could cause arbitrary code execution when using the Apple linker due to passing "-l to_library <path>" in a "#cgo LDFLAGS" directive. The Apple linker recombines the separated arguments "-l" and "to_library" into "-lto_library", which loads an arbitrary LTO plugin dynamic library at link time. The go command now disallows "-l" followed by "to_library" in "#cgo LDFLAGS", rejects "-lazy_library", "-lazy_framework", "-load_hidden", "-library", and "-library-path", and checks recombined "-l" arguments against disallowed linker flags and patterns.

Weakness (CWE): CWE-88

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Go toolchain	cmd/go	< 1.26.11, 1.27.0-0 – < 1.27.4

References and patches

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