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.
Published: 2026-11-11
Score: n/a
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
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History

Wed, 11 Nov 2026 03:30:00 +0000

Type Values Removed Values Added
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.
Title Arbitrary code execution during build on darwin via "-l to_library" in cgo in cmd/go
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cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-11-11T03:13:16.347Z

Reserved: 2026-09-23T23:05:04.987Z

Link: CVE-2026-97036

cve-icon Vulnrichment

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cve-icon NVD

Status : Received

Published: 2026-11-11T05:19:57.713

Modified: 2026-11-11T05:19:57.713

Link: CVE-2026-97036

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

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