{"id":"CVE-2020-36469","aliases":["EUVD-2021-1708","GHSA-fvhr-7j8m-3cvc","RUSTSEC-2020-0149"],"status":"published","title":"Data races in appendix","description":"An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00978,"percentile":0.62621,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-362"],"published":"2020-11-15T12:00:00Z","modified":"2026-06-17T03:15:33Z","affected":[{"source":"ghsa","ecosystem":"crates.io","package":"appendix","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.2.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"appendix","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.2.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"appendix","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"}]}]}],"products":[{"vendor":"appendix_project","product":"appendix"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0149.html","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","web","advisory"]},{"url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/appendix/RUSTSEC-2020-0149.md","tags":["x_refsource_MISC","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-36469","tags":["advisory"]},{"url":"https://github.com/krl/appendix/issues/6","tags":["web","report"]},{"url":"https://github.com/advisories/GHSA-fvhr-7j8m-3cvc"},{"url":"https://github.com/krl/appendix","tags":["package"]},{"url":"https://crates.io/crates/appendix","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-36469","description":"An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.","status":"published","published":"2021-08-08T05:11:49Z","modified":"2024-08-04T17:30:07.889Z","updated_at":"2026-11-02T14:35:55.128961Z"}],"euvd":[{"id":"EUVD-2021-1708","description":"An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.","status":"published","published":"2021-08-08T05:11:49Z","modified":"2024-08-04T17:30:07Z","updated_at":"2026-11-03T03:07:03.010139Z"}],"ghsa":[{"id":"GHSA-fvhr-7j8m-3cvc","title":"Data races in appendix","description":"The `appendix` crate implements a key-value mapping data structure called\n`Index\u003cK, V\u003e` that is stored on disk. The crate allows for any type to inhabit\nthe generic `K` and `V` type parameters and implements Send and Sync for them\nunconditionally.\n\nUsing a type that is not marked as `Send` or `Sync` with `Index` can allow it\nto be used across multiple threads leading to data races. Additionally using\nreference types for the keys or values will lead to the segmentation faults\nin the crate's code.","status":"published","published":"2021-08-25T20:57:02Z","modified":"2023-02-01T05:06:12Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T14:36:38.281533Z"}],"nvd":[{"id":"CVE-2020-36469","description":"An issue was discovered in the appendix crate through 2020-11-15 for Rust. For the generic K and V type parameters, Send and Sync are implemented unconditionally.","status":"published","published":"2021-08-08T06:15:08.267Z","modified":"2026-06-17T03:15:33.513Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:06:44.292752Z"}],"osv":[{"id":"GHSA-fvhr-7j8m-3cvc","title":"Data races in appendix","description":"The `appendix` crate implements a key-value mapping data structure called\n`Index\u003cK, V\u003e` that is stored on disk. The crate allows for any type to inhabit\nthe generic `K` and `V` type parameters and implements Send and Sync for them\nunconditionally.\n\nUsing a type that is not marked as `Send` or `Sync` with `Index` can allow it\nto be used across multiple threads leading to data races. Additionally using\nreference types for the keys or values will lead to the segmentation faults\nin the crate's code.","status":"published","published":"2021-08-25T20:57:02Z","modified":"2023-11-08T04:03:46.748675Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-362"],"updated_at":"2026-11-02T15:46:46.760785Z"},{"id":"RUSTSEC-2020-0149","title":"Data race and memory safety issue in `Index`","description":"The `appendix` crate implements a key-value mapping data structure called\n`Index\u003cK, V\u003e` that is stored on disk. The crate allows for any type to inhabit\nthe generic `K` and `V` type parameters and implements Send and Sync for them\nunconditionally.\n\nUsing a type that is not marked as `Send` or `Sync` with `Index` can allow it\nto be used across multiple threads leading to data races. Additionally using\nreference types for the keys or values will lead to the segmentation faults\nin the crate's code.","status":"published","published":"2020-11-15T12:00:00Z","modified":"2023-11-08T04:03:46.748675Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}