{"cve":"CVE-2021-38512","nvd":{"published":"2021-08-10T23:15:07.277","modified":"2026-06-17T04:02:15.620","status":"Modified","description":"An issue was discovered in the actix-http crate before 3.0.0-beta.9 for Rust. HTTP/1 request smuggling (aka HRS) can occur, potentially leading to credential disclosure.","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:N/A:N","score":7.5},"cwes":["CWE-444"],"references":["https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO/","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-http/RUSTSEC-2021-0081.md","https://rustsec.org/advisories/RUSTSEC-2021-0081.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/67URRW4K47SR6LNQB4YALPLGGQMQK7HO/","https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/actix-http/RUSTSEC-2021-0081.md"],"products":["actix:actix-http","fedoraproject:fedora"],"source":"nvd","synced_at":"2026-10-19T21:21:13.713336758+00:00"},"epss":{"cve":"CVE-2021-38512","score":0.0181,"percentile":0.78622,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-8928-2fgm-6x9x","url":"https://osv.dev/vulnerability/GHSA-8928-2fgm-6x9x","summary":"HTTP Request Smuggling in actix-http","modified":"2023-11-08T04:06:27.940101Z","packages":[{"ecosystem":"crates.io","name":"actix-http","purl":"pkg:cargo/actix-http","ranges":["<2.2.1"],"fixed":["2.2.1"]}]},{"id":"RUSTSEC-2021-0081","url":"https://osv.dev/vulnerability/RUSTSEC-2021-0081","summary":"Potential request smuggling capabilities due to lack of input validation","modified":"2023-11-08T04:06:27.940101Z","packages":[{"ecosystem":"crates.io","name":"actix-http","purl":"pkg:cargo/actix-http","ranges":[">=0.0.0-0 <2.2.1",">=3.0.0-0 <3.0.0-beta.9"],"fixed":["2.2.1","3.0.0-beta.9"]}]}],"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."]}