High severity · published Feb 10, 2026
CVE-2026-1847
MongoDB Server may crash when inserting large documents
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
Inserting certain large documents into a replica set could lead to replica set secondaries not being able to fetch the oplog from the primary. This could stall replication inside the replica set leading to server crash.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
7.0.0 before 7.0.29; 8.0.0 before 8.0.18; 8.2.0 before 8.2.4 · source: NVD
MS
MongoDB Server · MongoDB Inc
8.0 before 8.0.18; 7.0 before 7.0.29 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1847
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1847
Vendor Advisory
https://jira.mongodb.org/browse/SERVER-113532
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