{"answers":{"affected":"6 open source packages ship an affected version, including io.netty:netty, io.netty:netty-codec-http and org.jboss.netty:netty. It affects 6 products.","exploited":"There is no known exploitation of CVE-2019-20444 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2019-20444 is a critical vulnerability in Canonical Ubuntu Linux, published on 29 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-20444 and fix it if it is affected.\n\nWhat it is: CVE-2019-20444 is a critical vulnerability in Canonical Ubuntu Linux, published on 29 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2019-20444 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty (Maven): affected all versions; no fix listed\n- io.netty:netty (Maven): affected all versions; no fix listed\n- io.netty:netty-codec-http (Maven): affected all versions; fixed in 4.1.44\n- io.netty:netty-codec-http (Maven): affected all versions; fixed in 4.1.44\n- org.jboss.netty:netty (Maven): affected all versions; no fix listed\n- org.jboss.netty:netty (Maven): affected all versions; no fix listed\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2019-20444/ (Markdown: https://insights.sbomify.com/CVE-2019-20444/index.md)","id":"CVE-2019-20444","markdown":"https://insights.sbomify.com/CVE-2019-20444/index.md","name":"CVE-2019-20444","record":{"aliases":["CLEANSTART-2026-LY33744","DEBIAN-CVE-2019-20444","GHSA-cqqj-4p63-rrmm","MINI-j29m-45rf-qpgv","MINI-x628-m8c6-m8fp","UBUNTU-CVE-2019-20444"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["other"],"network_reachable":"yes","non_default_config":false,"product_category":"Netty HTTP decoder","requires_auth":"none","summary":"Netty's HTTP decoder mishandles headers lacking colons, potentially causing request smuggling or parsing errors in applications using the library.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"fedora","vendor":"fedoraproject"},{"product":"netty","vendor":"netty"},{"product":"jboss_amq_clients","vendor":"redhat"},{"product":"jboss_enterprise_application_platform","vendor":"redhat"}],"cvss":{"score":9.1,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-444","name":"Inconsistent Interpretation of HTTP Requests"}],"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.\"","ecosystems":["Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"HTTP Request Smuggling in Netty","id":"CVE-2019-20444","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","netty:netty","redhat:jboss_enterprise_application_platform"],"type":"other","year":"2019"},"n_packages":6,"n_references":67,"next":{"headline":"HTTP Request Smuggling in Netty","id":"CVE-2019-20445"},"packages":[{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":[],"package":"io.netty:netty","purl":null,"source":"GHSA-cqqj-4p63-rrmm"},{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":[],"package":"io.netty:netty","purl":"pkg:maven/io.netty/netty","source":"GHSA-cqqj-4p63-rrmm"},{"ecosystem":"Maven","fixed":["4.1.44"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":null,"source":"GHSA-cqqj-4p63-rrmm"},{"ecosystem":"Maven","fixed":["4.1.44"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http","purl":"pkg:maven/io.netty/netty-codec-http","source":"GHSA-cqqj-4p63-rrmm"},{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":[],"package":"org.jboss.netty:netty","purl":null,"source":"GHSA-cqqj-4p63-rrmm"},{"ecosystem":"Maven","fixed":[],"introduced":["0"],"last_affected":[],"package":"org.jboss.netty:netty","purl":"pkg:maven/org.jboss.netty/netty","source":"GHSA-cqqj-4p63-rrmm"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2019-20443"},"products":["n/a"],"published":"2020-01-29","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-08","vendors":["n/a"]},"summary":"Netty's HTTP decoder mishandles headers lacking colons, potentially causing request smuggling or parsing errors in applications using the library.","url":"https://insights.sbomify.com/CVE-2019-20444/"}