CVE-2025-14847
and MongoDB Server Improper Handling of Length Parameter Inconsistency in MongoDB and MongoDB Server. CISA confirmed attackers exploit it and added it to its Known Exploited Vulnerabilities catalog on 29 December 2025.
- Product
- MongoDB and MongoDB Server
- Added to CISA's catalog
- Federal fix-by date
- Ransomware
- No known use in ransomware campaigns
- Vendor advisories
- Sources
- CISA’s catalog, NVD entry
CISA’s description.
MongoDB Server contains an improper handling of length parameter inconsistency vulnerability in Zlib compressed protocol headers. This vulnerability may allow a read of uninitialized heap memory by an unauthenticated client.
Every flaw CISA confirmed exploited in the last 30 days is on the exploit watch. This is not security advice. Check the vendor’s advisory before acting. From CISA’s catalog of 30 October 2026.