The internment crate 0.8.7 for Rust can trigger execution of malicious code when compiling a project that uses the crate, because it has a rogue dependency that registers with a command-and-control server to offer arbitrary code execution.

The internment crate version 0.8.7 for the Rust programming language has been identified as containing a rogue dependency that executes malicious code at compile time. When a developer compiles a project that depends on this crate, the malicious dependency silently registers with a command-and-control (C2) server, enabling arbitrary code execution on the developer's machine. This is classified as a build-time supply chain attack, where the compromise occurs during the software build process rather than at runtime. The attack vector is linked to a broader supply chain campaign involving the arrayref and proc-macro1 Rust crates. Multiple security advisories and blog posts from the Rust community, RustSec, SafeDep, and StepSecurity have documented this incident. The vulnerability is tracked as CVE-2026-77649 and RUSTSEC-2026-0266. Developers using the internment crate 0.8.7 are urged to update or remove the dependency immediately.