VULNERABILITY INTELLIGENCE
CVE-2026-85625
CVSS score8.1 HIGH
EPSS probability0.73%
CISA KEVNot currently listed
Published2026-09-04
Last modified2026-09-14
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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.
Weakness classification
- disclosure@vulncheck.com: CWE-1321