The append-only-vec crate 0.1.9 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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
droundy:append-only-vec
References 5
https://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref
NVD
https://github.com/rustsec/advisory-db/issues/3161
NVD
https://www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack
NVD
https://safedep.io/arrayref-proc-macro1-rust-build-time-malware/
NVD
https://rustsec.org/advisories/RUSTSEC-2026-0262.html
NVD