CVE-2026-118383
Pre-authentication use-after-free in MongoDB Server replica set primary catch-up
CVSS Score
9.0
EPSS Score
0.0%
EPSS Percentile
0th
A use-after-free in the replication component of MongoDB Server can occur when a newly elected replica set primary completes catch-up. The condition can be caused by requests that do not require authentication, and may result in the server terminating unexpectedly or, under certain conditions, arbitrary code execution in the context of the server process. Replica set members are affected, including the shard and config server replica set members of sharded clusters; standalone mongod instances are not.
| CWE | CWE-416 |
| Vendor | mongodb |
| Product | mongodb server |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
MongoDB / MongoDB Server
9.0.0 < 9.0.7 8.3.0 < 8.3.16 8.0.0 < 8.0.37 7.0.0 < 7.0.48 6.0.0 < 6.0.30 5.0.0 < 5.0.35 4.4.0 < 4.4.32