MongoDB Vulnerability CVE-2025-14847 Under Active Exploitation Worldwide
Dec 29, 2026
Database Security / Vulnerability
A recently disclosed security vulnerability in MongoDB has come under active exploitation in the wild, with over 87,000 potentially susceptible instances identified across the world. The vulnerability in question is CVE-2025-14847 (CVSS score: 8.7), which allows an unauthenticated attacker to remotely leak sensitive data from the MongoDB server memory. It has been codenamed MongoBleed . "A flaw in zlib compression allows attackers to trigger information leakage," OX Security said . "By sending malformed network packets, an attacker can extract fragments of private data." The problem is rooted in MongoDB Server's zlib message decompression implementation ("message_compressor_zlib.cpp"). It affects instances with zlib compression enabled, which is the default configuration. Successful exploitation of the shortcoming could allow an attacker to extract sensitive information from MongoDB servers, including user information, passwords, and API keys. ...