Medium severity · published Jul 22, 2026
CVE-2026-13062
MongoDB mongos Improper Validation of Internal Flags in Queryable Encryption Write Commands on Sharded Clusters
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
An authenticated user with write privileges on a Queryable Encryption-enabled collection may be able to modify internal encryption metadata fields that are intended to be server-controlled, by sending crafted write commands through the mongos router on a sharded cluster. This can result in corruption of encrypted query correctness.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
7.0 before 7.0.39; 8.0 before 8.0.28; 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-2026-13062
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-13062
Vendor Advisory
https://jira.mongodb.org/browse/SERVER-127831
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