CVE-2026-82052: MongoDB

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

The $regexFindAll expression can be used by an authenticated user who can run aggregation pipeline stages to crash a MongoDB server (mongod). Under certain specific conditions the  regex match can start in the middle of a multi-code-unit character, triggering an assertion during query execution.

Affected products

• MongoDB MongoDB: from 7.0.0, before 7.0.41 (fixed in 7.0.41); from 8.0.0, before 8.0.30 (fixed in 8.0.30); from 8.3.0, before 8.3.9 (fixed in 8.3.9)

Published 2026-09-08. Last modified 2026-09-16.