{"answers":{"affected":"2 open source packages ship an affected version, including shell-quote. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-42740 in the wild and no public exploit code.","fix":"Upgrade shell-quote to 1.7.3 or later.","what":"CVE-2021-42740 is a critical command injection vulnerability in n/a, published on 21 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-2021-42740 and fix it if it is affected.\n\nWhat it is: CVE-2021-42740 is a critical command injection vulnerability in n/a, published on 21 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-2021-42740 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- shell-quote (npm): affected from 1.6.3; fixed in 1.7.3\n- shell-quote (npm): affected from 1.6.3; fixed in 1.7.3\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-2021-42740/ (Markdown: https://insights.sbomify.com/CVE-2021-42740/index.md)","id":"CVE-2021-42740","markdown":"https://insights.sbomify.com/CVE-2021-42740/index.md","name":"CVE-2021-42740","record":{"aliases":["CLSA-2026-1773879463","DEBIAN-CVE-2021-42740","GHSA-g4rg-993r-mgx7","ROOT-APP-NPM-CVE-2021-42740","UBUNTU-CVE-2021-42740"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js shell-quote library","requires_auth":"none","summary":"Attackers can execute arbitrary commands via shell metacharacters in the shell-quote Node.js library due to a flawed regex.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"shell-quote","vendor":"shell-quote_project"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"}],"description":"The shell-quote package before 1.7.3 for Node.js allows command injection. An attacker can inject unescaped shell metacharacters through a regex designed to support Windows drive letters. If the output of this package is passed to a real shell as a quoted argument to a command with exec(), an attacker can inject arbitrary commands. This is because the Windows drive letter regex character class is {A-z] instead of the correct {A-Za-z]. Several shell metacharacters exist in the space between capital letter Z and lower case letter a, such as the backtick character.","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":"Improper Neutralization of Special Elements used in a Command in Shell-quote","id":"CVE-2021-42740","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"command_injection","year":"2021"},"n_packages":2,"n_references":3,"next":{"headline":"Local privilege escalation via a default path in Splunk Enterprise Windows","id":"CVE-2021-42743"},"packages":[{"ecosystem":"npm","fixed":["1.7.3"],"introduced":["1.6.3"],"last_affected":[],"package":"shell-quote","purl":null,"source":"GHSA-g4rg-993r-mgx7"},{"ecosystem":"npm","fixed":["1.7.3"],"introduced":["1.6.3"],"last_affected":[],"package":"shell-quote","purl":"pkg:npm/shell-quote","source":"GHSA-g4rg-993r-mgx7"}],"prev":{"headline":"Memory corruption in n/a","id":"CVE-2021-42739"},"products":["n/a"],"published":"2021-10-21","related":[{"cvss_score":9.8,"headline":"Potential Command Injection in shell-quote","id":"CVE-2016-10541","kev_date_added":null,"published":"2018-05-31"},{"cvss_score":8.7,"headline":"shell-quote parse() is quadratic in token count, enabling denial of service","id":"CVE-2026-13311","kev_date_added":null,"published":"2026-06-25"}],"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":["n/a"]},"summary":"Attackers can execute arbitrary commands via shell metacharacters in the shell-quote Node.js library due to a flawed regex.","url":"https://insights.sbomify.com/CVE-2021-42740/"}