{"cve":"CVE-2026-46681","nvd":{"published":"2026-07-21T15:16:35.177","modified":"2026-10-24T20:10:00.137","status":"Deferred","description":"@nevware21/ts-utils is a comprehensive TypeScript/JavaScript utility library. Prior to version 0.14.0, the _copyProps function in lib/src/object/copy.ts uses for...in to iterate over source object properties without an Object.hasOwnProperty check, and does not filter dangerous keys (__proto__, constructor, prototype). This allows an attacker to pollute the prototype chain of all objects in the application. Version 0.14.0 patches the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U","score":7.2},"cvss_v3":null,"cwes":["CWE-1321"],"references":["https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb","https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43","https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-46681","score":0.00359,"percentile":0.29362,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-x7j8-49r8-mr43","url":"https://osv.dev/vulnerability/GHSA-x7j8-49r8-mr43","summary":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","modified":"2026-09-10T03:51:07.205441100Z","packages":[{"ecosystem":"npm","name":"@nevware21/ts-utils","purl":"pkg:npm/%40nevware21/ts-utils","ranges":["<0.14.0"],"fixed":["0.14.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}