CVE-2026-77650

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.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.8% chance of exploitation in the next 30 days; higher than 56% of CVEs (scores of 2026-10-25)

CWE

CWE-506

Published

2026-08-21

Modified

2026-10-18

Record from

the NVD, synced 2026-10-19

References

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

Check your stackJSON