{"id":"CVE-2020-35884","aliases":["EUVD-2021-1626","GHSA-7v2r-wxmg-mgvc","RUSTSEC-2020-0031"],"status":"published","title":"HTTP Request smuggling in tiny_http","description":"An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01087,"percentile":0.65584,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2020-06-16T12:00:00Z","modified":"2026-10-24T10:30:17Z","fixes":[{"ecosystem":"crates.io","package":"tiny_http","fixed_in":["0.8.0","0.6.3"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"tiny_http","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.8.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"tiny_http","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.8.0"}]}]},{"source":"osv","ecosystem":"crates.io","package":"tiny_http","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.6.3"},{"introduced":"0.7.0-0"},{"fixed":"0.8.0"}]}]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"tiny-http_project","product":"tiny-http"}],"references":[{"url":"https://rustsec.org/advisories/RUSTSEC-2020-0031.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VO6SRTCEPEYO2OX647I3H5XUWLFDRDWL/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M3JDNRE5RXJOWZZZF5QSCG4GUCSLTHF2/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35884","tags":["advisory"]},{"url":"https://github.com/tiny-http/tiny-http/issues/173","tags":["web","report"]},{"url":"https://github.com/tiny-http/tiny-http/pull/190","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M3JDNRE5RXJOWZZZF5QSCG4GUCSLTHF2/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VO6SRTCEPEYO2OX647I3H5XUWLFDRDWL/"},{"url":"https://github.com/tiny-http/tiny-http/commit/623b87397a569729c4bcabae747823c5668cce94","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7v2r-wxmg-mgvc"},{"url":"https://github.com/tiny-http/tiny-http","tags":["package"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M3JDNRE5RXJOWZZZF5QSCG4GUCSLTHF2","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VO6SRTCEPEYO2OX647I3H5XUWLFDRDWL","tags":["web"]},{"url":"https://crates.io/crates/tiny_http","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-35884","description":"An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.","status":"published","published":"2020-12-31T08:25:45Z","modified":"2024-08-04T17:16:13.047Z","updated_at":"2026-11-02T14:35:57.975444Z"}],"euvd":[{"id":"EUVD-2021-1626","description":"An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.","status":"published","published":"2020-12-31T08:25:45Z","modified":"2024-08-04T17:16:13Z","updated_at":"2026-11-03T03:07:04.595509Z"}],"ghsa":[{"id":"GHSA-7v2r-wxmg-mgvc","title":"HTTP Request smuggling in tiny_http","description":"HTTP pipelining issues and request smuggling attacks are possible due to incorrect Transfer encoding header parsing. It is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.","status":"published","published":"2021-08-25T20:48:56Z","modified":"2023-06-13T21:49:11Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:36:54.225318Z"}],"nvd":[{"id":"CVE-2020-35884","description":"An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.","status":"published","published":"2020-12-31T10:15:16.333Z","modified":"2026-06-17T03:14:31.923Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:06:28.340168Z"}],"osv":[{"id":"CVE-2020-35884","description":"An issue was discovered in the tiny_http crate through 2020-06-16 for Rust. HTTP Request smuggling can occur via a malformed Transfer-Encoding header.","status":"published","published":"2020-12-31T10:15:16.333Z","modified":"2026-10-24T10:30:17.066621293Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:16.612899Z"},{"id":"GHSA-7v2r-wxmg-mgvc","title":"HTTP Request smuggling in tiny_http","description":"HTTP pipelining issues and request smuggling attacks are possible due to incorrect Transfer encoding header parsing. It is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.","status":"published","published":"2021-08-25T20:48:56Z","modified":"2023-11-08T04:03:37.438533Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:46:41.349637Z"},{"id":"RUSTSEC-2020-0031","title":"HTTP Request smuggling through malformed Transfer Encoding headers","description":"HTTP pipelining issues and request smuggling attacks are possible due to incorrect \nTransfer encoding header parsing.\n\nIt is possible conduct HTTP request smuggling attacks (CL:TE/TE:TE) by sending invalid Transfer Encoding headers. \n\nBy manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information \nfrom requests other than their own.","status":"published","published":"2020-06-16T12:00:00Z","modified":"2023-11-08T04:03:37.438533Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:53:39.492624Z"}]}}