Unexpected code execution via --sysroot, -target, -isysroot, -Wl,-syslibroot, and -x cgo flags 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
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.
Source excerpt · OSVAttack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
Check the exact model, release, and any platform requirements against your installation.
Go toolchain · Go
cmd/go
2 ranges
Go toolchain · Go
cmd/go
Compare with this publisher’s ranges. This does not inspect your installation.
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-2026-6858
View original version evidence (0 explicit versions)
What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
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
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.
References
4 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-97033View 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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Source updated
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Last imported by cve.new
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What changed
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