Medium severity · published Jul 22, 2026
CVE-2026-13063
libmongocrypt Improper Input Validation Leading to Process Termination
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
An authenticated user with standard read/write privileges can cause the mongod process to terminate due to an out-of-memory condition by sending a crafted aggregation command. MongoDB's libmongocrypt library insufficiently validates payload-supplied values, which can result in an excessively large memory allocation.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
8.2.0 before 8.2.12; 8.3.0 before 8.3.7 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-13063
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13063
Vendor Advisory
https://jira.mongodb.org/browse/SERVER-127737
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