CVE-2026-4358 PUBLISHED

Memory safety issues in slot-based execution hash table spill

Assigner: mongodb
Reserved: 17.03.2026 Published: 17.03.2026 Updated: 17.03.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
CVSS Score: 6.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	High	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
CVSS Score: 6.4

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	Low	Integrity Impact	Low
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	MongoDB Inc
Product	MongoDB Server
Versions	Default: unaffected affected from 8.2 to 8.2.6 (excl.) affected from 8.0 to 8.0.20 (excl.) affected from 7.0 to 7.0.31 (excl.)

References

https://jira.mongodb.org/browse/SERVER-118849

Problem Types

CWE-415 Double free CWE