{"id":"CVE-2026-107353","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107353","generatedAt":"2026-10-28T01:12:34.435Z","title":"traverse (npm) versions 0.3.6 through 0.3.9, 0.4.0 through 0.4.6, 0.5.0 through 0.5.2, and 0.6.0 through 0.6.11 allow prototype pollution through set().","description":"traverse (npm) versions 0.3.6 through 0.3.9, 0.4.0 through 0.4.6, 0.5.0 through 0.5.2, and 0.6.0 through 0.6.11 allow prototype pollution through set(). When the path passed to set() crosses a primitive value, the next path segment is resolved on that primitive's built-in prototype, so an application that passes an untrusted path to set() lets an attacker add or overwrite properties of String.prototype, Number.prototype, or Boolean.prototype using plain JSON data, for example traverse({ name: 'bob' }).set(['name', '__proto__', 'polluted'], 'yes'). Object.prototype was reachable only with a non-data path segment, such as an object whose toString returns a different value on each call, or through a Proxy that accepts an assignment without storing it. This is fixed in 0.3.10, 0.4.7, 0.5.3, and 0.6.12.","published":"2026-10-07T20:17:12.000Z","lastModified":"2026-10-08T21:34:49.000Z","status":"Awaiting Analysis","sourceIdentifier":"7ffcee3d-2c14-4c3e-b844-86c6a321a158","cvss":{"version":"4.0","score":6.9,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-1321"],"affected":[],"epss":{"score":0.0028,"percentile":0.20281,"date":"2026-10-26","history":[{"date":"2026-10-08","score":0.0028,"percentile":0.18721}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.28%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-07T20:17:12.000Z","detail":{"score":"6.9","severity":"MEDIUM","publishedAt":"2026-10-07T20:17:11.860Z"},"summary":"New CVE, medium severity (CVSS 6.9)."}],"references":[{"url":"https://github.com/ljharb/js-traverse/commit/37a9ebd103d2a259c824c29cdcc3f0dfe1acffce","source":"7ffcee3d-2c14-4c3e-b844-86c6a321a158"},{"url":"https://github.com/ljharb/js-traverse/commit/81ccab43e379cf42eb2a5f689630f7f79b3d71b8","source":"7ffcee3d-2c14-4c3e-b844-86c6a321a158"},{"url":"https://github.com/ljharb/js-traverse/security/advisories/GHSA-rj28-8w7x-jmqc","source":"7ffcee3d-2c14-4c3e-b844-86c6a321a158"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107353","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}