---
id: CVE-2026-107353
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()
summary: >-
  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 re…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-1321
vendor: ljharb
product: traverse
affected:
  - traverse >= 0.3.6 < 0.3.10
  - traverse >= 0.4.0 < 0.4.7
  - traverse >= 0.5.0 < 0.5.3
  - traverse >= 0.6.0 < 0.6.12
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T21:17:15.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107353'
references:
  - url: >-
      https://github.com/ljharb/js-traverse/commit/37a9ebd103d2a259c824c29cdcc3f0dfe1acffce
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
  - url: >-
      https://github.com/ljharb/js-traverse/commit/81ccab43e379cf42eb2a5f689630f7f79b3d71b8
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
  - url: >-
      https://github.com/ljharb/js-traverse/security/advisories/GHSA-rj28-8w7x-jmqc
    label: 7ffcee3d-2c14-4c3e-b844-86c6a321a158
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-07T20:36:56.178663Z'
ingestedAt: '2026-10-07T20:46:46.978Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.