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High severity7.1NVD Advisory· Published Aug 11, 2026· Updated Sep 16, 2026

CVE-2026-18688

CVE-2026-18688

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

6
  • MongoDB/MongoDB4 versions
    cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*range: >=7.0.0,<7.0.40
    • cpe:2.3:a:mongodb:mongodb:9.0.0:alpha0:*:*:-:-:*:*
    • cpe:2.3:a:mongodb:mongodb:9.0.0:alpha1:*:*:-:-:*:*
    • cpe:2.3:a:mongodb:mongodb:9.1.0:alpha0:*:*:-:-:*:*
  • MongoDB/Serverllm-fuzzy
  • osv-coords
    pkg:bitnami/mongodb
    Range: >= 7.0.0, < 7.0.40

Patches

Vulnerability mechanics

References

1

News mentions

1