Cato CTRL Threat Research: New MongoDB Vulnerability Allows Instant Remote Server Takedown (CVE-2026-25611)
Cato CTRL’s Vitaly Simonovich (senior security researcher) has discovered a new vulnerability (CVE-2026-25611 with a “High” severity rating of 7.5 out of 10) in all MongoDB versions with compression enabled (version 3.4+, enabled by default since version 3.6), including MongoDB Atlas. The vulnerability can enable a threat actor to crash any MongoDB server. MongoDB Atlas clusters are not internet-reachable by default.