Google Cmd/Go up to 1.26.10/1.27.3 Cgo argument injection

Summaryinfo

A vulnerability categorized as problematic has been discovered in Google Cmd and Go up to 1.26.10/1.27.3. Affected by this issue is some unknown functionality of the component Cgo. Such manipulation leads to argument injection. This vulnerability is referenced as CVE-2026-97035. The attack can only be performed from a local environment. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Cmd and Go up to 1.26.10/1.27.3. It has been rated as problematic. Affected by this issue is an unknown functionality of the component Cgo. The manipulation with an unknown input leads to a argument injection vulnerability. Using CWE to declare the problem leads to CWE-88. The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When using Clang or GCC, building a malicious package that uses cgo could cause unexpected code execution at build time or write files to arbitrary directories via "-gen-*" or "-gnat*" flags in "#cgo" directives. The "-g*" wildcard in the compiler and linker flag allowlists previously matched Clang's two-argument "-gen-cdb-fragment-path <dir>" flag and GCC's two-argument "-gnatO <file>" flag, permitting compilation database fragments and sidecar output files to be written to arbitrary directories and desynchronizing flag argument parsing between the go command and the compiler driver so that subsequent arguments could be passed as unvalidated positional inputs to the linker. "-gen-*" and "-gnat*" flags are now disallowed in "#cgo" compiler and linker flags.

This vulnerability is handled as CVE-2026-97035 since 09/24/2026. The exploitation is known to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/11/2026). This vulnerability is assigned to T1059 by the MITRE ATT&CK project.

Upgrading to version 1.26.11 or 1.27.4 eliminates this vulnerability.

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Productinfo

Type

• Programming Language Software

Vendor

• Google

Name

• Cmd
• Go

Version

• 1.26.0
• 1.26.1
• 1.26.2
• 1.26.3
• 1.26.4
• 1.26.5
• 1.26.6
• 1.26.7
• 1.26.8
• 1.26.9
• 1.26.10
• 1.27.0
• 1.27.1
• 1.27.2
• 1.27.3

License

• free

Website

• Vendor: https://www.google.com/

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