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

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Go toolchain / cmd/go (cmd/go): ≥ 0; < 1.26.11 (affected, semver); ≥ 1.27.0-0; < 1.27.4 (affected, semver). Source: CNA: Go; platforms: darwin

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-88

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://go.dev/cl/862149 (CNA: Go)

- https://go.dev/issue/82574 (CNA: Go)

- https://groups.google.com/g/golang-announce/c/iY8TY0wWgbM (CNA: Go)

- https://pkg.go.dev/vuln/GO-2026-6855 (CNA: Go)

## Provenance

- CNA: Go: https://www.cve.org/CVERecord?id=CVE-2026-97036; retrieved 2026-11-11; source updated 2026-11-11

Revision: cef219d3ef682c5779d0dabf5218bcff46d809ee554232be2d62ebf8b935825e

Canonical: https://y2.dev/cve/CVE-2026-97036

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