{"schema_version":"1.7.3","id":"GHSA-qxf4-chvg-4r8r","published":"2020-02-28T01:10:48Z","modified":"2026-08-07T08:12:22.137703329Z","aliases":["BIT-tomcat-2020-1935","CVE-2020-1935"],"summary":"Potential HTTP request smuggling in Apache Tomcat","details":"In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered unlikely.","affected":[{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.100"}]}],"versions":["7.0.0","7.0.11","7.0.12","7.0.14","7.0.16","7.0.19","7.0.2","7.0.20","7.0.21","7.0.22","7.0.23","7.0.25","7.0.26","7.0.27","7.0.28","7.0.29","7.0.30","7.0.32","7.0.33","7.0.34","7.0.35","7.0.37","7.0.39","7.0.4","7.0.40","7.0.41","7.0.42","7.0.47","7.0.5","7.0.50","7.0.52","7.0.53","7.0.54","7.0.55","7.0.56","7.0.57","7.0.59","7.0.6","7.0.61","7.0.62","7.0.63","7.0.64","7.0.65","7.0.67","7.0.68","7.0.69","7.0.70","7.0.72","7.0.73","7.0.75","7.0.76","7.0.77","7.0.78","7.0.79","7.0.8","7.0.81","7.0.82","7.0.84","7.0.85","7.0.86","7.0.88","7.0.90","7.0.91","7.0.92","7.0.93","7.0.94","7.0.96","7.0.99"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.5.51"}]}],"versions":["8.0.1","8.0.11","8.0.12","8.0.14","8.0.15","8.0.17","8.0.18","8.0.20","8.0.21","8.0.22","8.0.23","8.0.24","8.0.26","8.0.27","8.0.28","8.0.29","8.0.3","8.0.30","8.0.32","8.0.33","8.0.35","8.0.36","8.0.37","8.0.38","8.0.39","8.0.41","8.0.42","8.0.43","8.0.44","8.0.45","8.0.46","8.0.47","8.0.48","8.0.49","8.0.5","8.0.50","8.0.51","8.0.52","8.0.53","8.0.8","8.0.9","8.5.0","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.19","8.5.2","8.5.20","8.5.21","8.5.23","8.5.24","8.5.27","8.5.28","8.5.29","8.5.3","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.37","8.5.38","8.5.39","8.5.4","8.5.40","8.5.41","8.5.42","8.5.43","8.5.45","8.5.46","8.5.47","8.5.49","8.5.5","8.5.50","8.5.6","8.5.8","8.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}},{"package":{"name":"org.apache.tomcat.embed:tomcat-embed-core","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat.embed/tomcat-embed-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.31"}]}],"versions":["9.0.1","9.0.10","9.0.11","9.0.12","9.0.13","9.0.14","9.0.16","9.0.17","9.0.19","9.0.2","9.0.20","9.0.21","9.0.22","9.0.24","9.0.26","9.0.27","9.0.29","9.0.30","9.0.4","9.0.5","9.0.6","9.0.7","9.0.8"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}},{"package":{"name":"org.apache.tomcat:tomcat","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.100"}]}],"versions":["7.0.35","7.0.37","7.0.39","7.0.40","7.0.41","7.0.42","7.0.47","7.0.50","7.0.52","7.0.53","7.0.54","7.0.55","7.0.56","7.0.57","7.0.59","7.0.61","7.0.62","7.0.63","7.0.64","7.0.65","7.0.67","7.0.68","7.0.69","7.0.70","7.0.72","7.0.73","7.0.75","7.0.76","7.0.77","7.0.78","7.0.79","7.0.81","7.0.82","7.0.84","7.0.85","7.0.86","7.0.88","7.0.90","7.0.91","7.0.92","7.0.93","7.0.94","7.0.96","7.0.99"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}},{"package":{"name":"org.apache.tomcat:tomcat","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.5.51"}]}],"versions":["8.0.1","8.0.11","8.0.12","8.0.14","8.0.15","8.0.17","8.0.18","8.0.20","8.0.21","8.0.22","8.0.23","8.0.24","8.0.26","8.0.27","8.0.28","8.0.29","8.0.3","8.0.30","8.0.32","8.0.33","8.0.35","8.0.36","8.0.37","8.0.38","8.0.39","8.0.41","8.0.42","8.0.43","8.0.44","8.0.45","8.0.46","8.0.47","8.0.48","8.0.49","8.0.5","8.0.50","8.0.51","8.0.52","8.0.53","8.0.8","8.0.9","8.5.0","8.5.11","8.5.12","8.5.13","8.5.14","8.5.15","8.5.16","8.5.19","8.5.2","8.5.20","8.5.21","8.5.23","8.5.24","8.5.27","8.5.28","8.5.29","8.5.3","8.5.30","8.5.31","8.5.32","8.5.33","8.5.34","8.5.35","8.5.37","8.5.38","8.5.39","8.5.4","8.5.40","8.5.41","8.5.42","8.5.43","8.5.45","8.5.46","8.5.47","8.5.49","8.5.5","8.5.50","8.5.6","8.5.8","8.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}},{"package":{"name":"org.apache.tomcat:tomcat","ecosystem":"Maven","purl":"pkg:maven/org.apache.tomcat/tomcat"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.0.31"}]}],"versions":["9.0.1","9.0.10","9.0.11","9.0.12","9.0.13","9.0.14","9.0.16","9.0.17","9.0.19","9.0.2","9.0.20","9.0.21","9.0.22","9.0.24","9.0.26","9.0.27","9.0.29","9.0.30","9.0.4","9.0.5","9.0.6","9.0.7","9.0.8"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-qxf4-chvg-4r8r/GHSA-qxf4-chvg-4r8r.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-1935"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpuoct2020.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujul2020.html"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2021.html"},{"type":"WEB","url":"https://www.debian.org/security/2020/dsa-4680"},{"type":"WEB","url":"https://www.debian.org/security/2020/dsa-4673"},{"type":"WEB","url":"https://usn.ubuntu.com/4448-1"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20200327-0005"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00026.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/03/msg00006.html"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rd547be0c9d821b4b1000a694b8e58ef9f5e2d66db03a31dfe77c4b18@%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/rc31cbabb46cdc58bbdd8519a8f64b6236b2635a3922bbeba0f0e3743@%3Ccommits.tomee.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/ra5dee390ad2d60307b8362505c059cd6a726de4d146d63dfce1e05e7@%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r9ce7918faf347e7aac32be930bf26c233b0b140fe37af0bb294158b6@%3Cdev.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r80e9c8417c77d52c62809168b96912bda70ddf7748f19f8210f745b1@%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r7bc994c965a34876bd94d5ff15b4e1e30b6220a15eb9b47c81915b78@%3Ccommits.tomee.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r660cd379afe346f10d72c0eaa8459ccc95d83aff181671b7e9076919@%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r441c1f30a252bf14b07396286f6abd8089ce4240e91323211f1a2d75@%3Cusers.tomcat.apache.org%3E"},{"type":"WEB","url":"https://lists.apache.org/thread.html/r127f76181aceffea2bd4711b03c595d0f115f63e020348fe925a916c%40%3Cannounce.tomcat.apache.org%3E"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00025.html"}],"database_specific":{"cwe_ids":["CWE-444"],"github_reviewed":true,"github_reviewed_at":"2020-02-25T16:18:59Z","nvd_published_at":"2020-02-24T22:15:00Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}