CVE-2026-82052

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.

  • Published Sep 8, 2026
  • CVSS 7.1 high
  • 0.5% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-82052 at the National Vulnerability Database