{"id":"EUVD-2021-1440","revision":"3f08c303c9c94835a6d14b5ebd83ecb3","records":[{"revision":"3f08c303c9c94835a6d14b5ebd83ecb3","observedAt":"2026-10-24T19:20:54.571+00:00","statement":{"source":"euvd","id":"EUVD-2021-1440","aliases":["CVE-2021-32714","GHSA-5h46-h7hh-c6x9"],"title":"hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combine…","description":"hyper is an HTTP library for Rust. In versions prior to 0.14.10, hyper's HTTP server and client code had a flaw that could trigger an integer overflow when decoding chunk sizes that are too big. This allows possible data loss, or if combined with an upstream HTTP proxy that allows chunk sizes larger than hyper does, can result in \"request smuggling\" or \"desync attacks.\" The vulnerability is patched in version 0.14.10. Two possible workarounds exist. One may reject requests manually that contain a `Transfer-Encoding` header or ensure any upstream proxy rejects `Transfer-Encoding` chunk sizes greater than what fits in 64-bit unsigned integers.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","score":5.9,"severity":null}],"references":["https://github.com/hyperium/hyper/security/advisories/GHSA-5h46-h7hh-c6x9"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-1440","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 7, 2021, 7:35:10 PM","dateUpdated":"Aug 3, 2024, 11:25:31 PM"},"relatedAdvisories":[{"id":"openSUSE-SU-2024:11751-1","title":"afterburn-5.0.0-6.1 on GA media","vulnerabilityIds":["CVE-2020-35905","CVE-2020-36465","CVE-2021-27378","CVE-2021-32714","CVE-2021-32715","CVE-2021-38191","CVE-2021-45710"]},{"id":"msrc_CVE-2021-32714","title":"Integer Overflow in Chunked Transfer-Encoding","vulnerabilityIds":["CVE-2021-32714"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2021-1440","identifiers":["EUVD-2021-1440","CVE-2021-32714","GHSA-5h46-h7hh-c6x9"]},"retained":false,"historicalAffected":[]}],"coverage":[]}