CVE-2026-4358

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution (SBE) engine when an in-memory hash table is spilled to disk.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-415

Affected software

Vendor	Product	Versions
MongoDB Inc	MongoDB Server	>= 8.2, < 8.2.6; >= 8.0, < 8.0.20; >= 7.0, < 7.0.31

References

https://jira.mongodb.org/browse/SERVER-118849Exploit, Vendor Advisory

Timeline

Published: Mar 17, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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