CVE-2026-18688

HIGH

Out-of-Bounds Read in MongoDB Aggregation Framework Leads to Denial of Service and Potential Memory Disclosure

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-18688 has a selected CVSS score of 7.1 (high).

Description

An issue in MongoDB Server's aggregation framework could allow an authenticated user to trigger an out-of-bounds memory read by providing a specially formed numeric parameter in a certain aggregation pipeline stage. This could result in a server crash (denial of service) and may potentially expose a limited amount of memory contents.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactPartial

CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 11, 2026 · Source: CVE List

Affected products and versions

1
ProductSourceVersion range

MongoDB Server

Browse MongoDB / MongoDB Server

Default status: unaffected

CVE List8.3.0 to < 8.3.8affected
8.0 to < 8.0.29affected
7.0 to < 7.0.40affected

References

2