{"schema_version":"1.9.0","id":"RUSTSEC-2026-0262","published":"2026-08-20T12:00:00Z","modified":"2026-10-20T11:00:02.677736709Z","summary":"`append-only-vec` 0.1.9 was removed from crates.io due to a malicious dependency","details":"A new version of the `append-only-vec` crate was published with a direct dependency\non `proc-macro1`, which would execute a malicious build script.\n\nThe compromised version of this crate was published on 2026-08-20, and was\nremoved approximately 107 minutes later.\n\nThe compromised crate version was used as part of a malware campaign targeted\nat users of `arrayref`, which was downloaded 2,285 times before being removed;\nsee [the `arrayref` advisory][arrayref-advisory] for more detail.\n\n[arrayref-advisory]: https://rustsec.org/advisories/RUSTSEC-2026-0260.html","affected":[{"package":{"name":"append-only-vec","ecosystem":"crates.io","purl":"pkg:cargo/append-only-vec"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.1.9"},{"fixed":"0.1.10-0"}]}],"ecosystem_specific":{"affected_functions":null,"affects":{"arch":[],"functions":[],"os":[]}},"database_specific":{"categories":["malicious"],"cvss":null,"informational":null,"source":"https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0262.json"}}],"references":[{"type":"PACKAGE","url":"https://crates.io/crates/append-only-vec"},{"type":"ADVISORY","url":"https://rustsec.org/advisories/RUSTSEC-2026-0262.html"},{"type":"WEB","url":"https://blog.rust-lang.org/2026/08/20/supply-chain-attack-on-arrayref"}],"database_specific":{"license":"CC0-1.0"}}