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CVE-2026-8201

Use-After-Free in MongoDB FLE Query Analysis When Processing Positional Projections on Encrypted Fields

Published: May 13, 2026Updated: May 13, 2026 Sources: CVE List NVDCWE-416
NVD MITRE
6.4CVSSMEDIUM
EPSS Score
0.1%
Top 97.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A use-after-free vulnerability exists in MongoDB's Field-Level Encryption (FLE) query analysis component, affecting client-side uses of mongocryptd and crypt_shared. Triggering this vulnerability requires control over the structure of a client's FLE-related query. This issue impacts MongoDB Server’s mongocryptd component v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:LI:LA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:HAvailability
High
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Weaknesses

CWE-416

Affected Products

MongoDB ServerMongoDB, Inc.
Mixed
Databases / nosql
mongodbmongodb
On-premDatabase
Databases / nosql
mongodb, inc.commercialUSDatabasesaka mongodb
mongodbcommercialUSDatabases

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://jira.mongodb.org/browse/SERVER-122032
jira.mongodb.org

Timeline

Published
May 13, 2026
Last Updated
May 13, 2026

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