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Case File

CVE-2021-26707

CRITICAL · CVSS 9.8 EPSS 1.90% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-02 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

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

GitHub PoC Links
github.com ↗ securitylab.github.com ↗

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

CVE
CVE-2021-26707
Severity
CRITICAL
CVSS
9.8
EPSS
1.90%

Original NVD Description

The merge-deep library before 3.0.3 for Node.js can be tricked into overwriting properties of Object.prototype or adding new properties to it. These properties are then inherited by every object in the program, thus facilitating prototype-pollution attacks against applications using this library.