PT-2026-61831 · Undefined · Undefined

Dezhen Kong · CVE-2026-16266 · Published 2026-07-21 · Updated 2026-07-21

Mitre

CVSS v3.1

4.0

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

Versions of the package mongo-object before 3.0.3 are vulnerable to Prototype Pollution via the expandKey() function in util.js. An attacker can modify the JavaScript prototype chain by supplying a crafted property path containing special keys such as proto .

Fix

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2026-16266

Affected Products

Undefined

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-16266 · Security Note
• https://github.com/longshotlabs/mongo-object/issues/27 · Note
• https://github.com/longshotlabs/mongo-object/blob/4f7a570f2a2fcfa9417b7870d5f859e9574ec73c/src/util.ts%23L251 · Note
• https://github.com/longshotlabs/mongo-object/commit/638314107d8b397e5453c28e41729522b3e8d67c · Note
• https://security.snyk.io/vuln/SNYK-JS-MONGOOBJECT-13816714 · Note