{"answers":{"affected":"4 open source packages ship an affected version, including react-native. It affects 1 product.","exploited":"There is no known exploitation of CVE-2020-1920 in the wild and no public exploit code.","fix":"Upgrade react-native to a fixed version for your release line: 0.62.3 or 0.64.1.","what":"CVE-2020-1920 is a high-severity denial of service vulnerability in Facebook react-native, published on 1 Jun 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-2020-1920 and fix it if it is affected.\n\nWhat it is: CVE-2020-1920 is a high-severity denial of service vulnerability in Facebook react-native, published on 1 Jun 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-2020-1920 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- react-native (npm): affected from 0.59.0; fixed in 0.62.3\n- react-native (npm): affected from 0.59.0; fixed in 0.62.3\n- react-native (npm): affected from 0.63.0; fixed in 0.64.1\n- react-native (npm): affected from 0.63.0; fixed in 0.64.1\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-2020-1920/ (Markdown: https://insights.sbomify.com/CVE-2020-1920/index.md)","id":"CVE-2020-1920","markdown":"https://insights.sbomify.com/CVE-2020-1920/index.md","name":"CVE-2020-1920","record":{"aliases":["GHSA-7f53-fmmv-mfjv"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"React Native library","requires_auth":"none","summary":"Attackers can cause application crashes or unresponsiveness via ReDoS in the validateBaseUrl function of the React Native library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"facebook","cpe":[{"product":"react-native","vendor":"facebook"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-697","name":"Incorrect Comparison"},{"id":"CWE-1333","name":"Inefficient Regular Expression Complexity"}],"description":"A regular expression denial of service (ReDoS) vulnerability in the validateBaseUrl function can cause the application to use excessive resources, become unresponsive, or crash. This was introduced in react-native version 0.59.0 and fixed in version 0.64.1.","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 in react-native","id":"CVE-2020-1920","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":4,"n_references":2,"next":{"headline":"Memory corruption in HHVM","id":"CVE-2020-1921"},"packages":[{"ecosystem":"npm","fixed":["0.62.3"],"introduced":["0.59.0"],"last_affected":[],"package":"react-native","purl":null,"source":"GHSA-7f53-fmmv-mfjv"},{"ecosystem":"npm","fixed":["0.62.3"],"introduced":["0.59.0"],"last_affected":[],"package":"react-native","purl":"pkg:npm/react-native","source":"GHSA-7f53-fmmv-mfjv"},{"ecosystem":"npm","fixed":["0.64.1"],"introduced":["0.63.0"],"last_affected":[],"package":"react-native","purl":null,"source":"GHSA-7f53-fmmv-mfjv"},{"ecosystem":"npm","fixed":["0.64.1"],"introduced":["0.63.0"],"last_affected":[],"package":"react-native","purl":"pkg:npm/react-native","source":"GHSA-7f53-fmmv-mfjv"}],"prev":{"headline":"Memory corruption in HHVM","id":"CVE-2020-1919"},"products":["react-native"],"published":"2021-06-01","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":"2024-08-04","vendors":["Facebook"]},"summary":"Attackers can cause application crashes or unresponsiveness via ReDoS in the validateBaseUrl function of the React Native library.","url":"https://insights.sbomify.com/CVE-2020-1920/"}