{"answers":{"affected":"4 open source packages ship an affected version, including org.python:jython and org.python:jython-standalone. It affects 2 products.","exploited":"There is no known exploitation of CVE-2016-4000 in the wild and no public exploit code.","fix":"Upgrade org.python:jython to 2.7.1b3 or later.","what":"CVE-2016-4000 is a critical unsafe deserialization vulnerability in Debian Debian Linux, published on 6 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-4000 and fix it if it is affected.\n\nWhat it is: CVE-2016-4000 is a critical unsafe deserialization vulnerability in Debian Debian Linux, published on 6 Jul 2017. 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-2016-4000 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.python:jython (Maven): affected all versions; fixed in 2.7.1b3\n- org.python:jython (Maven): affected all versions; fixed in 2.7.1b3\n- org.python:jython-standalone (Maven): affected all versions; fixed in 2.7.1b3\n- org.python:jython-standalone (Maven): affected all versions; fixed in 2.7.1b3\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-2016-4000/ (Markdown: https://insights.sbomify.com/CVE-2016-4000/index.md)","id":"CVE-2016-4000","markdown":"https://insights.sbomify.com/CVE-2016-4000/index.md","name":"CVE-2016-4000","record":{"aliases":["DEBIAN-CVE-2016-4000","DLA-989-1","DSA-3893-1","GHSA-6r7r-jj8h-pq6v","UBUNTU-CVE-2016-4000"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Jython library","requires_auth":"none","summary":"Attackers can execute arbitrary code by sending a crafted serialized PyFunction object to applications using the Jython library.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"jython","vendor":"jython_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Jython before 2.7.1rc1 allows attackers to execute arbitrary code via a crafted serialized PyFunction object.","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":"Deserialization of Untrusted Data in Jython","id":"CVE-2016-4000","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"debian:debian_linux","products":["debian:debian_linux"],"type":"deserialization","year":"2016"},"n_packages":4,"n_references":17,"next":{"headline":"Memory corruption in n/a","id":"CVE-2016-4001"},"packages":[{"ecosystem":"Maven","fixed":["2.7.1b3"],"introduced":["0"],"last_affected":[],"package":"org.python:jython","purl":null,"source":"GHSA-6r7r-jj8h-pq6v"},{"ecosystem":"Maven","fixed":["2.7.1b3"],"introduced":["0"],"last_affected":[],"package":"org.python:jython","purl":"pkg:maven/org.python/jython","source":"GHSA-6r7r-jj8h-pq6v"},{"ecosystem":"Maven","fixed":["2.7.1b3"],"introduced":["0"],"last_affected":[],"package":"org.python:jython-standalone","purl":null,"source":"GHSA-6r7r-jj8h-pq6v"},{"ecosystem":"Maven","fixed":["2.7.1b3"],"introduced":["0"],"last_affected":[],"package":"org.python:jython-standalone","purl":"pkg:maven/org.python/jython-standalone","source":"GHSA-6r7r-jj8h-pq6v"}],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2016-3999"},"products":["n/a"],"published":"2017-07-06","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-06","vendors":["n/a"]},"summary":"Attackers can execute arbitrary code by sending a crafted serialized PyFunction object to applications using the Jython library.","url":"https://insights.sbomify.com/CVE-2016-4000/"}