CVE-2026-85625

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    CVE-2026-85625

    Published: 4 Sept 2026Last Modified: 16 Sept 2026

    Summary: sift 17.1.3 Prototype Pollution Remote Code Execution via $where

    Details: 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.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85625.json, https://nvd.nist.gov/vuln/detail/CVE-2026-85625, https://www.vulncheck.com/advisories/sift-17.1.3-prototype-pollution-remote-code-execution-via-where, https://github.com/crcn/sift.js/issues/276, https://github.com/crcn/sift.js, https://github.com/crcn/sift.js/blob/v17.1.3/src/core.ts

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    v17.1.3
    v17.1.2
    v17.1.1
    v17.1.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-85625 | CVE-DB