CVE-2026-18688
HighCVSS 7.1Exploitation Probability (EPSS)
Low risk19th percentile - higher than 19% of all known CVEs
Summary
A vulnerability in MongoDB Server's aggregation framework allows 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.
Risk Assessment
The risk includes denial of service and potential memory disclosure, which could compromise confidentiality.
Recommendation
Update MongoDB Server to a patched version and restrict access to aggregation features for unauthorized users.
Original NVD description (English source)
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.