GCVE-110-OSM-2026-10785

Advisory PublishedCVSS 8.8/10

Vulnetix · Advisory published August 20, 2026

The build.rs script is a cross-platform dropper that downloads a binary from a hardcoded URL, writes it to a temporary directory (/tmp/rust-setup or temp_dir), and executes it using chmod/spawn on Unix and a hidden VBS/PowerShell launcher on Windows. Downloads malicious payload from: https://23[.254.165.112:9089/rust-crate_0.1.0 # Linux x86_64 https://23[.254.165.112:9089/rust-crate_0.2.0 # Windows x86_64 https://23[.254.165.112:9089/rust-crate_0.3.0 # macOS x86_64 https://23[.254.165.112:9089/rust-crate_0.4.0 # macOS ARM64

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Weaknesses (CWE)

CWE-506Embedded Malicious Code

Risk Scores

CVSS 3.1

8.8/10

High · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions	Platforms
unknown	proc-macro-en	all (affected)	—

References

Malicious crates package: proc-macro-en

advisory

vendor

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