Paper/Archive/CVE-2026-77650

CVE-2026-77650

droundy append-only-vec — 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…

EPSS 0.8%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 56.6.566 × 2011.3 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

append-only-vec0.1.9–CNA

Scores by source

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

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refblog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref refgithub.com/rustsec/advisory-db/issues/3161 refstepsecurity.io/blog/arrayref-rust-crate-supply-chain-attack refsafedep.io/arrayref-proc-macro1-rust-build-time-malware refrustsec.org/advisories/RUSTSEC-2026-0262.html