{"cve":"CVE-2020-10109","nvd":{"published":"2020-03-12T13:15:12.370","modified":"2026-06-17T02:47:22.450","status":"Modified","description":"In Twisted Web through 19.10.0, there was an HTTP request splitting vulnerability. When presented with a content-length and a chunked encoding header, the content-length took precedence and the remainder of the request body was interpreted as a pipelined request.","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:H/A:H","score":9.8},"cwes":["CWE-444"],"references":["https://know.bishopfox.com/advisories","https://know.bishopfox.com/advisories/twisted-version-19.10.0","https://lists.debian.org/debian-lts-announce/2022/02/msg00021.html","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ISMZFZBWW4EV6ETJGXAYIXN3AT7GBPL/","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3NIL7VXSGJND2Q4BSXM3CFTAFU6T7D/"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","twisted:twisted"],"source":"nvd","synced_at":"2026-10-19T21:02:53.949909883+00:00"},"epss":{"cve":"CVE-2020-10109","score":0.03289,"percentile":0.88481,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-p5xh-vx83-mxcj","url":"https://osv.dev/vulnerability/GHSA-p5xh-vx83-mxcj","summary":"HTTP Request Smuggling in Twisted","modified":"2024-11-25T18:47:01.872463Z","packages":[{"ecosystem":"PyPI","name":"twisted","purl":"pkg:pypi/twisted","ranges":["<20.3.0"],"fixed":["20.3.0"]}]},{"id":"PYSEC-2020-260","url":"https://osv.dev/vulnerability/PYSEC-2020-260","summary":"","modified":"2023-11-08T04:01:57.371289Z","packages":[{"ecosystem":"PyPI","name":"twisted","purl":"pkg:pypi/twisted","ranges":["<20.3.0rc1"],"fixed":["20.3.0rc1"]}]}],"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."]}