Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
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
FAQ
What is CVE-2026-77650?
CVE-2026-77650 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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-contr...
How severe is CVE-2026-77650?
CVE-2026-77650 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-77650?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.