Out-of-Memory Failure in MongoDB Server During Expression Evaluation
CVE-2026-1849

7.1HIGH

Key Information:

Vendor

MongoDB
Status
Mongodb Server
Vendor
CVE Published:
10 February 2026

What is CVE-2026-1849?

MongoDB Server may trigger an out-of-memory failure when processing expressions that result in deeply nested documents. This vulnerability stems from the absence of periodic checks on recursive function depth, which can lead to server crashes and degraded performance.

Affected Version(s)

MongoDB Server 8.0 < 8.0.18

MongoDB Server 7.0 < 7.0.29

MongoDB Server 8.2 < 8.2.2

References

https://jira.mongodb.org/browse/SERVER-102364

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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