{"cve":"CVE-2019-20444","nvd":{"published":"2020-01-29T21:15:11.047","modified":"2026-10-08T22:16:53.020","status":"Modified","description":"HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks a colon, which might be interpreted as a separate header with an incorrect syntax, or might be interpreted as an \"invalid fold.\"","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:N","score":9.1},"cwes":["CWE-444"],"references":["https://access.redhat.com/errata/RHSA-2020:0497","https://access.redhat.com/errata/RHSA-2020:0567","https://access.redhat.com/errata/RHSA-2020:0601","https://access.redhat.com/errata/RHSA-2020:0605","https://access.redhat.com/errata/RHSA-2020:0606"],"products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","netty:netty","redhat:jboss_amq_clients","redhat:jboss_enterprise_application_platform"],"source":"nvd","synced_at":"2026-10-19T21:01:01.339895972+00:00"},"epss":{"cve":"CVE-2019-20444","score":0.08914,"percentile":0.95199,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-cqqj-4p63-rrmm","url":"https://osv.dev/vulnerability/GHSA-cqqj-4p63-rrmm","summary":"HTTP Request Smuggling in Netty","modified":"2025-07-02T15:50:12Z","packages":[{"ecosystem":"Maven","name":"io.netty:netty-codec-http","purl":"pkg:maven/io.netty/netty-codec-http","ranges":["<4.1.44"],"fixed":["4.1.44"]},{"ecosystem":"Maven","name":"org.jboss.netty:netty","purl":"pkg:maven/org.jboss.netty/netty","ranges":["all versions"],"fixed":[]},{"ecosystem":"Maven","name":"io.netty:netty","purl":"pkg:maven/io.netty/netty","ranges":["all versions"],"fixed":[]}]}],"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."]}