{"id":"RUSTSEC-2021-0079","revision":"c0717b4e1e9f43cd830c6c147c122b64","records":[{"revision":"c0717b4e1e9f43cd830c6c147c122b64","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2021-0079","aliases":["CVE-2021-32714","GHSA-5h46-h7hh-c6x9"],"title":"Integer overflow in `hyper`'s parsing of the `Transfer-Encoding` header leads to data loss","description":"When decoding chunk sizes that are too large, `hyper`'s code would encounter an integer overflow. Depending on the situation,\nthis could lead to data loss from an incorrect total size, or in rarer cases, a request smuggling attack.\n\nTo be vulnerable, you must be using `hyper` for any HTTP/1 purpose, including as a client or server, and consumers must send\nrequests or responses that specify a chunk size greater than 18 exabytes. For a possible request smuggling attack to be possible,\nany upstream proxies must accept a chunk size greater than 64 bits.","state":0,"publishedAt":"2021-07-07T12:00:00+00:00","modifiedAt":"2026-10-12T18:00:02.6715445+00:00","affected":[{"ecosystem":"crates.io","name":"hyper","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.0.0-0"},{"kind":"fixed","version":"0.14.10"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","score":null,"severity":null}],"references":["https://crates.io/crates/hyper","https://rustsec.org/advisories/RUSTSEC-2021-0079.html","https://github.com/hyperium/hyper/commit/efd9a9821fd2f1ae04b545094de76a435b62e70f"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2021-0079","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2021-0079","identifiers":["RUSTSEC-2021-0079","CVE-2021-32714","GHSA-5h46-h7hh-c6x9"]},"retained":false,"historicalAffected":[]}],"coverage":[]}