CVE-2026-1849: MongoDB

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.

Affected products

• MongoDB MongoDB: from 7.0.0, before 7.0.29 (fixed in 7.0.29); from 8.0.0, before 8.0.18 (fixed in 8.0.18); from 8.2.0, before 8.2.2 (fixed in 8.2.2)

Published 2026-02-10. Last modified 2026-06-17.