{"answers":{"affected":"2 open source packages ship an affected version, including browserslist. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23364 in the wild and no public exploit code.","fix":"Upgrade browserslist to 4.16.5 or later.","what":"CVE-2021-23364 is a medium-severity denial of service vulnerability in browserslist, published on 28 Apr 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-2021-23364 and fix it if it is affected.\n\nWhat it is: CVE-2021-23364 is a medium-severity denial of service vulnerability in browserslist, published on 28 Apr 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-2021-23364 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- browserslist (npm): affected from 4.0.0; fixed in 4.16.5\n- browserslist (npm): affected from 4.0.0; fixed in 4.16.5\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-2021-23364/ (Markdown: https://insights.sbomify.com/CVE-2021-23364/index.md)","id":"CVE-2021-23364","markdown":"https://insights.sbomify.com/CVE-2021-23364/index.md","name":"CVE-2021-23364","record":{"aliases":["CLSA-2026-1774311645","CLSA-2026-1777163887","CLSA-2026-1788560456","DEBIAN-CVE-2021-23364","GHSA-w8qv-6jwh-64r5","ROOT-APP-NPM-CVE-2021-23364","UBUNTU-CVE-2021-23364"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"JavaScript browser list library","requires_auth":"none","summary":"Attackers can cause denial of service in applications using browserslist by providing specially crafted queries that trigger excessive CPU usage during parsing.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"browserslist","vendor":"browserslist_project"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P","version":"3.1"},"cwes":[{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"The package browserslist from 4.0.0 and before 4.16.5 are vulnerable to Regular Expression Denial of Service (ReDoS) during parsing of queries.","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":"Regular Expression Denial of Service (ReDoS)","id":"CVE-2021-23364","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":2,"n_references":5,"next":{"headline":"Authentication Bypass","id":"CVE-2021-23365"},"packages":[{"ecosystem":"npm","fixed":["4.16.5"],"introduced":["4.0.0"],"last_affected":[],"package":"browserslist","purl":null,"source":"GHSA-w8qv-6jwh-64r5"},{"ecosystem":"npm","fixed":["4.16.5"],"introduced":["4.0.0"],"last_affected":[],"package":"browserslist","purl":"pkg:npm/browserslist","source":"GHSA-w8qv-6jwh-64r5"}],"prev":{"headline":"Arbitrary Command Injection","id":"CVE-2021-23363"},"products":["browserslist"],"published":"2021-04-28","related":[],"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 cause denial of service in applications using browserslist by providing specially crafted queries that trigger excessive CPU usage during parsing.","url":"https://insights.sbomify.com/CVE-2021-23364/"}