{"cve":"CVE-2019-16143","nvd":{"published":"2019-09-09T12:15:11.023","modified":"2026-06-17T02:21:45.310","status":"Modified","description":"An issue was discovered in the blake2 crate before 0.8.1 for Rust. The BLAKE2b and BLAKE2s algorithms, when used with HMAC, produce incorrect results because the block sizes are half of the required sizes.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-327"],"references":["https://rustsec.org/advisories/RUSTSEC-2019-0019.html","https://rustsec.org/advisories/RUSTSEC-2019-0019.html"],"products":["blake2:blake2-rust"],"source":"nvd","synced_at":"2026-10-19T20:58:39.700375520+00:00"},"epss":{"cve":"CVE-2019-16143","score":0.00933,"percentile":0.60717,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4x25-pvhw-5224","url":"https://osv.dev/vulnerability/GHSA-4x25-pvhw-5224","summary":"Algorithms compute incorrect results in blake2","modified":"2023-11-08T04:01:16.407154Z","packages":[{"ecosystem":"crates.io","name":"blake2","purl":"pkg:cargo/blake2","ranges":["<0.8.1"],"fixed":["0.8.1"]}]},{"id":"RUSTSEC-2019-0019","url":"https://osv.dev/vulnerability/RUSTSEC-2019-0019","summary":"HMAC-BLAKE2 algorithms compute incorrect results","modified":"2023-11-08T04:01:16.407154Z","packages":[{"ecosystem":"crates.io","name":"blake2","purl":"pkg:cargo/blake2","ranges":[">=0.0.0-0 <0.8.1"],"fixed":["0.8.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}