{"answers":{"affected":"2 open source packages ship an affected version, including fastify-multipart. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23597 in the wild and no public exploit code.","fix":"Upgrade fastify-multipart to 5.3.1 or later.","what":"CVE-2021-23597 is a high-severity denial of service vulnerability in fastify-multipart, published on 11 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-23597 and fix it if it is affected.\n\nWhat it is: CVE-2021-23597 is a high-severity denial of service vulnerability in fastify-multipart, published on 11 Feb 2022. 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-2021-23597 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- fastify-multipart (npm): affected all versions; fixed in 5.3.1\n- fastify-multipart (npm): affected all versions; fixed in 5.3.1\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-2021-23597/ (Markdown: https://insights.sbomify.com/CVE-2021-23597/index.md)","id":"CVE-2021-23597","markdown":"https://insights.sbomify.com/CVE-2021-23597/index.md","name":"CVE-2021-23597","record":{"aliases":["GHSA-qh73-qc3p-rjv2","SNYK-JS-FASTIFYMULTIPART-2395480"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Node.js multipart library","requires_auth":"none","summary":"An attacker can crash the application by sending a multipart request with a specific property name, affecting users of the fastify-multipart library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"fastify-multipart","vendor":"fastify"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P","version":"3.1"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"description":"This affects the package fastify-multipart before 5.3.1. By providing a name=constructor property it is still possible to crash the application. **Note:** This is a bypass of CVE-2020-8136 (https://security.snyk.io/vuln/SNYK-JS-FASTIFYMULTIPART-1290382).","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":"Denial of Service (DoS)","id":"CVE-2021-23597","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":2,"n_references":3,"next":{"headline":"Prototype Pollution","id":"CVE-2021-23624"},"packages":[{"ecosystem":"npm","fixed":["5.3.1"],"introduced":["0"],"last_affected":[],"package":"fastify-multipart","purl":null,"source":"GHSA-qh73-qc3p-rjv2"},{"ecosystem":"npm","fixed":["5.3.1"],"introduced":["0"],"last_affected":[],"package":"fastify-multipart","purl":"pkg:npm/fastify-multipart","source":"GHSA-qh73-qc3p-rjv2"}],"prev":{"headline":"Sandbox Bypass","id":"CVE-2021-23594"},"products":["fastify-multipart"],"published":"2022-02-11","related":[{"cvss_score":7.5,"headline":"@fastify/multipart vulnerable to Denial of Service via aborted upload after fileSize limit","id":"CVE-2026-18549","kev_date_added":null,"published":"2026-08-15"},{"cvss_score":7.5,"headline":"@fastify/multipart vulnerable to Denial of Service via temporary file leak on aborted upload","id":"CVE-2026-19474","kev_date_added":null,"published":"2026-08-15"},{"cvss_score":7.5,"headline":"@fastify/multipart vulnerable to DoS due to unlimited number of parts","id":"CVE-2023-25576","kev_date_added":null,"published":"2023-02-14"},{"cvss_score":7.5,"headline":"Uncontrolled Resource Consumption in fastify-multipart","id":"CVE-2020-8136","kev_date_added":null,"published":"2020-03-20"}],"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":"2024-09-16","vendors":["n/a"]},"summary":"An attacker can crash the application by sending a multipart request with a specific property name, affecting users of the fastify-multipart library.","url":"https://insights.sbomify.com/CVE-2021-23597/"}