---
id: CVE-2026-85625
title: >-
  sift (sift.js) 17.1.3 enumerates query keys with for...in, which walks the
  object prototype chain, and dispatches any matched operator key including
  $where
summary: >-
  sift (sift.js) 17.1.3 enumerates query keys with for...in, which walks the
  object prototype chain, and dispatches any matched operator key including
  $where. The $where operation compiles a string value into a function using new
  Function …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-1321
  - CWE-94
vendor: crcn
product: sift.js
affected:
  - sift.js <= 17.1.3
published: '2026-09-04'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:16:58.987'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85625'
references:
  - url: 'https://github.com/crcn/sift.js'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/crcn/sift.js/blob/v17.1.3/src/core.ts'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/crcn/sift.js/issues/276'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/sift-17.1.3-prototype-pollution-remote-code-execution-via-where
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85625.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85625'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2533311'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85625'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85625'
tags:
  - nvd
  - exploit-available
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00547
epssPercentile: 0.44733
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/lgranadoi/sift-hardened'
  checkedAt: '2026-09-24T07:53:21.479Z'
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T19:20:21.665008Z'
ingestedAt: '2026-09-10T16:57:28.704Z'
---

## Overview

sift (sift.js) 17.1.3 enumerates query keys with for...in, which walks the object prototype chain, and dispatches any matched operator key including $where. The $where operation compiles a string value into a function using new Function unless CSP_ENABLED is set (not set by default). As a result, if a prototype-pollution primitive elsewhere in the process sets Object.prototype.$where to a malicious string, even benign filter calls such as sift({}) execute arbitrary JavaScript. Additionally, passing an untrusted query object containing a string $where directly to sift results in code execution under the default configuration.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · affected: Red Hat Ansible Automation Platform 2 · no fix planned: Red Hat Ansible Automation Platform 2 · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85625.json)