{"answers":{"affected":"It affects 10 products.","exploited":"There is no known exploitation of CVE-2019-16056 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2019-16056 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 6 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-16056 and fix it if it is affected.\n\nWhat it is: CVE-2019-16056 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 6 Sep 2019. 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-2019-16056 in the wild and no public exploit code.\n\nAffected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2019-16056/ (Markdown: https://insights.sbomify.com/CVE-2019-16056/index.md)","id":"CVE-2019-16056","markdown":"https://insights.sbomify.com/CVE-2019-16056/index.md","name":"CVE-2019-16056","record":{"aliases":["ALPINE-CVE-2019-16056","AZL-109629","CLEANSTART-2026-VJ78698","DEBIAN-CVE-2019-16056","DLA-1924-1","DLA-1925-1","GHSA-8mcc-mjj5-h77m","PSF-2019-5","RHSA-2020:2520","SUSE-RU-2020:1342-1","SUSE-SU-2021:14198-1","UBUNTU-CVE-2019-16056"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Python standard library","requires_auth":"none","summary":"The Python email module incorrectly parses addresses with multiple @ symbols, allowing attackers to bypass header validation checks in applications using this 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":"leap","vendor":"opensuse"},{"product":"communications_operations_monitor","vendor":"oracle"},{"product":"peoplesoft_enterprise_peopletools","vendor":"oracle"},{"product":"solaris","vendor":"oracle"},{"product":"zfs_storage_appliance_kit","vendor":"oracle"},{"product":"python","vendor":"python"},{"product":"software_collections","vendor":"redhat"}],"cvss":{"score":5.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-20","name":"Improper Input Validation"}],"description":"An issue was discovered in Python through 2.7.16, 3.x through 3.5.7, 3.6.x through 3.6.9, and 3.7.x through 3.7.4. The email module wrongly parses email addresses that contain multiple @ characters. An application that uses the email module and implements some kind of checks on the From/To headers of a message could be tricked into accepting an email address that should be denied. An attack may be the same as in CVE-2019-11340; however, this CVE applies to Python more generally.","ecosystems":["Red Hat:rhel_eus:7.7::computenode","Red Hat:rhel_eus:7.7::server","SUSE:Linux Enterprise Module for Basesystem 15 SP1","SUSE:Linux Enterprise Module for Development Tools 15 SP1","SUSE:Linux Enterprise Point of Sale 11 SP3","SUSE:Linux Enterprise Server 11 SP4-LTSS"],"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":"Other in n/a","id":"CVE-2019-16056","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","opensuse:leap","oracle:peoplesoft_enterprise_peopletools","oracle:solaris","oracle:zfs_storage_appliance_kit","python:python","redhat:software_collections"],"type":"other","year":"2019"},"n_packages":25,"n_references":34,"next":{"headline":"D-Link DNS-320 Remote Code Execution","id":"CVE-2019-16057"},"packages":[{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python","purl":"pkg:rpm/redhat/python","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-debug","purl":"pkg:rpm/redhat/python-debug","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-debuginfo","purl":"pkg:rpm/redhat/python-debuginfo","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-devel","purl":"pkg:rpm/redhat/python-devel","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-libs","purl":"pkg:rpm/redhat/python-libs","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-test","purl":"pkg:rpm/redhat/python-test","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-tools","purl":"pkg:rpm/redhat/python-tools","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::computenode","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"tkinter","purl":"pkg:rpm/redhat/tkinter","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python","purl":"pkg:rpm/redhat/python","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-debug","purl":"pkg:rpm/redhat/python-debug","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-debuginfo","purl":"pkg:rpm/redhat/python-debuginfo","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-devel","purl":"pkg:rpm/redhat/python-devel","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-libs","purl":"pkg:rpm/redhat/python-libs","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-test","purl":"pkg:rpm/redhat/python-test","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"python-tools","purl":"pkg:rpm/redhat/python-tools","source":"RHSA-2020:2520"},{"ecosystem":"Red Hat:rhel_eus:7.7::server","fixed":["0:2.7.5-87.el7_7"],"introduced":["0"],"last_affected":[],"package":"tkinter","purl":"pkg:rpm/redhat/tkinter","source":"RHSA-2020:2520"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP1","fixed":["3.6.10-3.53.1"],"introduced":["0"],"last_affected":[],"package":"python3","purl":"pkg:rpm/suse/python3\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1","source":"SUSE-RU-2020:1342-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP1","fixed":["3.6.10-3.53.1"],"introduced":["0"],"last_affected":[],"package":"python3-base","purl":"pkg:rpm/suse/python3-base\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP1","source":"SUSE-RU-2020:1342-1"},{"ecosystem":"SUSE:Linux Enterprise Module for Development Tools 15 SP1","fixed":["3.6.10-3.53.1"],"introduced":["0"],"last_affected":[],"package":"python3-base","purl":"pkg:rpm/suse/python3-base\u0026distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP1","source":"SUSE-RU-2020:1342-1"},{"ecosystem":"SUSE:Linux Enterprise Point of Sale 11 SP3","fixed":["2.6.9-40.32.2"],"introduced":["0"],"last_affected":[],"package":"python","purl":"pkg:rpm/suse/python\u0026distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3","source":"SUSE-SU-2021:14198-1"},{"ecosystem":"SUSE:Linux Enterprise Point of Sale 11 SP3","fixed":["2.6.9-40.32.1"],"introduced":["0"],"last_affected":[],"package":"python-base","purl":"pkg:rpm/suse/python-base\u0026distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3","source":"SUSE-SU-2021:14198-1"},{"ecosystem":"SUSE:Linux Enterprise Point of Sale 11 SP3","fixed":["2.6-8.40.32.1"],"introduced":["0"],"last_affected":[],"package":"python-doc","purl":"pkg:rpm/suse/python-doc\u0026distro=SUSE%20Linux%20Enterprise%20Point%20of%20Sale%2011%20SP3","source":"SUSE-SU-2021:14198-1"},{"ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","fixed":["2.6.9-40.32.2"],"introduced":["0"],"last_affected":[],"package":"python","purl":"pkg:rpm/suse/python\u0026distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS","source":"SUSE-SU-2021:14198-1"},{"ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","fixed":["2.6.9-40.32.1"],"introduced":["0"],"last_affected":[],"package":"python-base","purl":"pkg:rpm/suse/python-base\u0026distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS","source":"SUSE-SU-2021:14198-1"},{"ecosystem":"SUSE:Linux Enterprise Server 11 SP4-LTSS","fixed":["2.6-8.40.32.1"],"introduced":["0"],"last_affected":[],"package":"python-doc","purl":"pkg:rpm/suse/python-doc\u0026distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSS","source":"SUSE-SU-2021:14198-1"}],"prev":{"headline":"Cisco Smart Software Manager On-Prem Web Interface Denial of Service Vulnerability","id":"CVE-2019-16029"},"products":["n/a"],"published":"2019-09-06","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":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["n/a"]},"summary":"The Python email module incorrectly parses addresses with multiple @ symbols, allowing attackers to bypass header validation checks in applications using this library.","url":"https://insights.sbomify.com/CVE-2019-16056/"}