CVE-2026-4148
ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
A use-after-free vulnerability can be triggered in sharded clusters by an authenticated user with the read role who issues a specially crafted $lookup or $graphLookup aggregation pipeline.
| CWE | CWE-416 |
| Vendor | mongodb inc |
| Product | mongodb server |
| Published | Mar 17, 2026 |
| Last Updated | Mar 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
MongoDB Inc / MongoDB Server
8.2 < 8.2.6 8.0 < 8.0.20 7.0 < 7.0.31