{"answers":{"affected":"2 open source packages ship an affected version, including @npmcli/arborist. It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-39135 in the wild and no public exploit code.","fix":"Upgrade @npmcli/arborist to 2.8.2 or later.","what":"CVE-2021-39135 is a high-severity path traversal vulnerability in Oracle Graalvm, published on 31 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-39135 and fix it if it is affected.\n\nWhat it is: CVE-2021-39135 is a high-severity path traversal vulnerability in Oracle Graalvm, published on 31 Aug 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-39135 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- @npmcli/arborist (npm): affected all versions; fixed in 2.8.2\n- @npmcli/arborist (npm): affected all versions; fixed in 2.8.2\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-2021-39135/ (Markdown: https://insights.sbomify.com/CVE-2021-39135/index.md)","id":"CVE-2021-39135","markdown":"https://insights.sbomify.com/CVE-2021-39135/index.md","name":"CVE-2021-39135","record":{"aliases":["ALPINE-CVE-2021-39135","CLEANSTART-2026-IU52923","CLEANSTART-2026-JP73770","DEBIAN-CVE-2021-39135","GHSA-gmw6-94gg-2rc2","UBUNTU-CVE-2021-39135"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","data_modify"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"npm dependency manager","requires_auth":"none","summary":"Arborist library allows arbitrary file writes via symlinked node_modules, enabling code execution or data modification during npm install.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"arborist","vendor":"npmjs"},{"product":"graalvm","vendor":"oracle"},{"product":"sinec_infrastructure_network_services","vendor":"siemens"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"},{"id":"CWE-61","name":"UNIX Symbolic Link (Symlink) Following"}],"description":"`@npmcli/arborist`, the library that calculates dependency trees and manages the node_modules folder hierarchy for the npm command line interface, aims to guarantee that package dependency contracts will be met, and the extraction of package contents will always be performed into the expected folder. This is accomplished by extracting package contents into a project's `node_modules` folder. If the `node_modules` folder of the root project or any of its dependencies is somehow replaced with a symbolic link, it could allow Arborist to write package dependencies to any arbitrary location on the file system. Note that symbolic links contained within package artifact contents are filtered out, so another means of creating a `node_modules` symbolic link would have to be employed. 1. A `preinstall` script could replace `node_modules` with a symlink. (This is prevented by using `--ignore-scripts`.) 2. An attacker could supply the target with a git repository, instructing them to run `npm install --ignore-scripts` in the root. This may be successful, because `npm install --ignore-scripts` is typically not capable of making changes outside of the project directory, so it may be deemed safe. This is patched in @npmcli/arborist 2.8.2 which is included in npm v7.20.7 and above. For more information including workarounds please see the referenced GHSA-gmw6-94gg-2rc2.","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":"UNIX Symbolic Link (Symlink) Following in @npmcli/arborist","id":"CVE-2021-39135","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":"oracle:graalvm","products":["oracle:graalvm","siemens:sinec_infrastructure_network_services"],"type":"path_traversal","year":"2021"},"n_packages":2,"n_references":4,"next":{"headline":"Cross-site scripting vulnerability in file upload","id":"CVE-2021-39136"},"packages":[{"ecosystem":"npm","fixed":["2.8.2"],"introduced":["0"],"last_affected":[],"package":"@npmcli/arborist","purl":null,"source":"GHSA-gmw6-94gg-2rc2"},{"ecosystem":"npm","fixed":["2.8.2"],"introduced":["0"],"last_affected":[],"package":"@npmcli/arborist","purl":"pkg:npm/%40npmcli/arborist","source":"GHSA-gmw6-94gg-2rc2"}],"prev":{"headline":"UNIX Symbolic Link (Symlink) Following in @npmcli/arborist","id":"CVE-2021-39134"},"products":["arborist"],"published":"2021-08-31","related":[{"cvss_score":8.2,"headline":"UNIX Symbolic Link (Symlink) Following in @npmcli/arborist","id":"CVE-2021-39134","kev_date_added":null,"published":"2021-08-31"}],"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":"2024-08-04","vendors":["npm"]},"summary":"Arborist library allows arbitrary file writes via symlinked node_modules, enabling code execution or data modification during npm install.","url":"https://insights.sbomify.com/CVE-2021-39135/"}