The Rust Project has deleted malicious versions of three widely used Rust crates from crates.io after a compromised maintainer account published releases that added a typosquatted dependency whose build script downloaded and executed a remote payload during compilation. The affected releases are arrayref 0.3.10, internment 0.8.7, and append-only-vec 0.1.9, all published from the same owner account on August 20, 2026, and all removed within 86 to 107 minutes. Because the malicious code sat in the build script of the injected dependency, building a project that resolved it was sufficient to run the payload, and nothing from the crates themselves had to be called. Developers are advised to search ~/.cargo/registry/cache for the deleted crate files and to pin arrayref at 0.3.9 or earlier,…