Arbitrary code execution during build on darwin via "-l to_library" in cgo in cmd/go
Severity and exploitation
KEV coverage does not rule out exploitation.
Severity
unknownCVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Not established by this record
Missing evidence does not mean no public exploit exists.
Remediation
Package fixes recorded
Fix versions are recorded for 1 of 1 mapped packages. Check each release branch and any separate product guidance.
What this means
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 " in a "cgo LDFLAGS" directive.
Source excerpt · OSVAttack conditions
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Review supporting sources →Affected versions
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Go toolchain · Go
cmd/go
2 ranges
Go toolchain · Go
cmd/go
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affected
0 → before 1.26.11
semver versions
1.27.0-0 → before 1.27.4
semver versions
Other versions: unaffected
Packages
Compare each installed version with the publisher’s affected ranges. Where a fix is recorded, choose the appropriate release branch and test compatibility before upgrading.
| Affected range | Recorded fix |
|---|---|
| Earlier releases before 1.26.11Semantic versions | 1.26.11 |
| From 1.27.0-0 before 1.27.4Semantic versions | 1.27.4 |
Version evidence: OSV · GO-2026-6855
View original version evidence (0 explicit versions)
What to do
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Use the recorded fix for your release branch. Review the publisher’s instructions and test compatibility before upgrading.
cve.new guidance unless attributed to a publisher. This page does not inspect your installation.
Public exploit evidence
No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.
Original source description
Read the full publisher 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.
References
4 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-97036View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Contributing organizations · 1
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Timeline
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Last imported by cve.new
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What changed
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