{"id":"CVE-2026-46681","aliases":["EUVD-2026-46260","GHSA-x7j8-49r8-mr43","ROOT-APP-NPM-CVE-2026-46681"],"status":"published","title":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","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.","severity":{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00359,"percentile":0.30035,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2026-05-21T21:41:36Z","modified":"2026-10-28T02:31:07Z","fixes":[{"ecosystem":"npm","package":"@nevware21/ts-utils","fixed_in":["0.14.0"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"@nevware21/ts-utils","fixed_in":["0.12.5-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/nevware21__ts-utils","fixed_in":["0.12.5-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@nevware21/ts-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.13.0"},{"fixed":"0.14.0"}]}]},{"source":"osv","ecosystem":"npm","package":"@nevware21/ts-utils","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.14.0"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@nevware21/ts-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.5-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/nevware21__ts-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.5-root.io.1"}]}]}],"products":[{"vendor":"nevware21","product":"ts-utils"}],"references":[{"url":"https://github.com/nevware21/ts-utils/security/advisories/GHSA-x7j8-49r8-mr43","tags":["x_refsource_CONFIRM","exploit","advisory","web"]},{"url":"https://github.com/nevware21/ts-utils/commit/5e887f4e2fbee7160c8f501634c45e6a229e83bb","tags":["x_refsource_MISC","fix"]},{"url":"https://github.com/advisories/GHSA-x7j8-49r8-mr43"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46681.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46681","tags":["advisory"]},{"url":"https://github.com/nevware21/ts-utils","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-46681","title":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","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.","status":"published","published":"2026-07-21T14:02:03.732Z","modified":"2026-07-21T15:00:58.09Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T13:47:06.353366Z"}],"euvd":[{"id":"EUVD-2026-46260","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.","status":"published","published":"2026-07-21T14:02:03Z","modified":"2026-07-21T15:00:58Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"updated_at":"2026-11-02T18:19:47.436242Z"}],"ghsa":[{"id":"GHSA-x7j8-49r8-mr43","title":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","description":"## Summary\n\nThe _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.\n\n## Details\n\nIn _copyProps() (copy.ts lines 186-191), the code iterates all enumerable properties including inherited ones and dangerous keys like __proto__. Any object with a __proto__ key (e.g., from untrusted JSON input) will overwrite the target's prototype.\n\n## PoC\n```\nconst malicious = JSON.parse('{\"__proto__\": {\"polluted\": true}}');\nobjDeepCopy(malicious);\nconsole.log({}.polluted); // true\n```\n## Suggested Fix\n\nAdd objHasOwnProperty check and filter __proto__, constructor, prototype keys.","status":"published","published":"2026-05-21T21:41:36Z","modified":"2026-05-21T21:41:36Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:40:13.628377Z"}],"nvd":[{"id":"CVE-2026-46681","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.","status":"published","published":"2026-07-21T15:16:35.177Z","modified":"2026-10-24T20:10:00.137Z","cvss":[{"version":"4.0","score":7.2,"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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:12:31.024898Z"}],"osv":[{"id":"CVE-2026-46681","title":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","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.","status":"published","published":"2026-07-21T14:02:03.732Z","modified":"2026-10-28T02:31:07.692616292Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:45:06.231145Z"},{"id":"GHSA-x7j8-49r8-mr43","title":"@nevware21/ts-utils: Prototype Pollution in objDeepCopy/objCopyProps via for...in without hasOwnProperty","description":"## Summary\n\nThe _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.\n\n## Details\n\nIn _copyProps() (copy.ts lines 186-191), the code iterates all enumerable properties including inherited ones and dangerous keys like __proto__. Any object with a __proto__ key (e.g., from untrusted JSON input) will overwrite the target's prototype.\n\n## PoC\n```\nconst malicious = JSON.parse('{\"__proto__\": {\"polluted\": true}}');\nobjDeepCopy(malicious);\nconsole.log({}.polluted); // true\n```\n## Suggested Fix\n\nAdd objHasOwnProperty check and filter __proto__, constructor, prototype keys.","status":"published","published":"2026-05-21T21:41:36Z","modified":"2026-09-10T03:51:07.2054411Z","cvss":[{"version":"4.0","score":7.2,"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:59.484835Z"},{"id":"ROOT-APP-NPM-CVE-2026-46681","title":"CVE-2026-46681 in @nevware21/ts-utils - Patched by Root","description":"Root has patched CVE-2026-46681 in the @nevware21/ts-utils package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-09-11T08:23:16Z","modified":"2026-09-11T09:15:03.924432425Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}