{"answers":{"affected":"2 open source packages ship an affected version, including vm2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23449 in the wild and no public exploit code.","fix":"Upgrade vm2 to 3.9.4 or later.","what":"CVE-2021-23449 is a critical code injection vulnerability in vm2, published on 18 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-23449 and fix it if it is affected.\n\nWhat it is: CVE-2021-23449 is a critical code injection vulnerability in vm2, published on 18 Oct 2021. 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-2021-23449 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- vm2 (npm): affected all versions; fixed in 3.9.4\n- vm2 (npm): affected all versions; fixed in 3.9.4\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-2021-23449/ (Markdown: https://insights.sbomify.com/CVE-2021-23449/index.md)","id":"CVE-2021-23449","markdown":"https://insights.sbomify.com/CVE-2021-23449/index.md","name":"CVE-2021-23449","record":{"aliases":["GHSA-rjf2-j2r6-q8gr","SNYK-JS-VM2-1585918"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript sandbox library","requires_auth":"none","summary":"Attackers can execute arbitrary code on the host machine by exploiting a prototype pollution vulnerability in the vm2 sandbox library.","user_interaction":"not_required","vuln_class":"code_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"vm2","vendor":"vm2_project"}],"cvss":{"score":9.8,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.","ecosystems":["npm"],"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":"Sandbox Bypass","id":"CVE-2021-23449","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"code_injection","year":"2021"},"n_packages":2,"n_references":5,"next":{"headline":"Prototype Pollution","id":"CVE-2021-23450"},"packages":[{"ecosystem":"npm","fixed":["3.9.4"],"introduced":["0"],"last_affected":[],"package":"vm2","purl":null,"source":"GHSA-rjf2-j2r6-q8gr"},{"ecosystem":"npm","fixed":["3.9.4"],"introduced":["0"],"last_affected":[],"package":"vm2","purl":"pkg:npm/vm2","source":"GHSA-rjf2-j2r6-q8gr"}],"prev":{"headline":"Prototype Pollution","id":"CVE-2021-23448"},"products":["vm2"],"published":"2021-10-18","related":[{"cvss_score":10,"headline":"vm2: Sandbox Escape","id":"CVE-2026-43997","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":10,"headline":"vm2: Sandbox escape","id":"CVE-2026-44005","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":10,"headline":"vm2: Sandbox Escape","id":"CVE-2026-44006","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":10,"headline":"vm2 Sandbox Escape vulnerability","id":"CVE-2023-29017","kev_date_added":null,"published":"2023-04-06"},{"cvss_score":10,"headline":"vm2 vulnerable to Sandbox Escape before v3.9.11","id":"CVE-2022-36067","kev_date_added":null,"published":"2022-09-06"},{"cvss_score":9.9,"headline":"vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape","id":"CVE-2026-43999","kev_date_added":null,"published":"2026-05-13"},{"cvss_score":9.8,"headline":"vm2: Snabox breakout via `neutralizeArraySpeciesBatch`","id":"CVE-2026-44008","kev_date_added":null,"published":"2026-05-13"}],"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":"2024-09-17","vendors":["n/a"]},"summary":"Attackers can execute arbitrary code on the host machine by exploiting a prototype pollution vulnerability in the vm2 sandbox library.","url":"https://insights.sbomify.com/CVE-2021-23449/"}