SEPTEMBER 7, 2026
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Case File

CVE-2026-16266

MEDIUM · CVSS 4 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-21 · Last synced 2026-08-20

CyberRota Analysis

AI-Generated

Versions of the mongo-object package prior to 3.0.3 are susceptible to Prototype Pollution through the expandKey() function in util.js, allowing attackers to manipulate the JavaScript prototype chain by providing specially crafted property paths. This vulnerability could lead to unexpected behavior in applications relying on this package, potentially compromising data integrity or enabling further attacks. Developers and security teams using affected versions should prioritize patching to mitigate the risk associated with this vulnerability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-16266
Severity
MEDIUM
CVSS
4
EPSS
0.25%
Java

Original NVD 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__.