23 Oct 2026 15:48:27 UTC
sift 17.1.3 Prototype Pollution Remote Code Execution via $where
cve-program · CVE-2026-85625 · Published
CVE-2026-85625
sift 17.1.3 Prototype Pollution Remote Code Execution via $where
CVSS 4.0 9.2 CRITICALCVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-85625
Publishedsift (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.
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