Daily Insight: Infrastructure | MongoDB Pre-Auth Memory Leak Under Active Exploitation

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Assumption Retired Default database configurations provide acceptable pre-authentication security posture.

Insight MongoBleed (CVE-2025-14847) is now under active exploitation. High severity (CVSS varies by source; NVD currently rates it high). Zlib compression: enabled by default. The flaw allows unauthenticated attackers to send malformed compressed packets that return uninitialized heap memory. Credentials, API keys, session tokens. Per SecurityWeek: PoC exploit released December 26, exploitation observed shortly after. Censys: 87,000+ vulnerable instances exposed. Wiz: 42% of cloud environments host at least one vulnerable MongoDB instance. The vulnerability is reachable before authentication, requires no user interaction. Fixed in MongoDB versions 8.2.3, 8.0.17, 7.0.28, 6.0.27, 5.0.32, 4.4.30.

Unresolved Edge What percentage of organizations have inventory visibility into which MongoDB instances run zlib compression, and which have applied the patch before attackers reached them?