CVE-2026-16266

MEDIUM

Mongo-object < 3.0.3 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Title source: rule
STIX 2.1

Description

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__.

References (4)

Core 4

Scores

CVSS v3 4.0
EPSS 0.0025
EPSS Percentile 16.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1321
Status published
Products (1)
None/mongo-object < 3.0.3
Published Jul 21, 2026
Tracked Since Jul 21, 2026