Critical severity9.8NVD Advisory· Published Aug 21, 2026

CVE-2026-77650

Description

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.

Affected products

Rustsec/advisory-dbllm-create
Range: <0.1.9

Patches

Vulnerability mechanics

References

blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayrefnvd
github.com/rustsec/advisory-db/issues/3161nvd
rustsec.org/advisories/RUSTSEC-2026-0262.htmlnvd
safedep.io/arrayref-proc-macro1-rust-build-time-malware/nvd
www.stepsecurity.io/blog/arrayref-rust-crate-supply-chain-attacknvd

News mentions

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cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000