High severity · published Sep 10, 2026
CVE-2026-88034
GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ Driver
8.3
CVSS
0.5%
EPSS
No
On KEV
Description
Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB C++ Driver can cause a caller-supplied structured file identifier to be interpreted as a query condition rather than as a literal identifier. An authenticated user who can influence the identifier passed by an affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 39% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MO
MongoDB · MongoDB
3.2.0 before 4.5.3 · source: vendor
CD
C++ Driver · Mongodb
3.2.0 before 4.5.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88034
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88034
Vendor Advisory
https://jira.mongodb.org/browse/CXX-3556
More from MongoDB
9.9
CVE-2019-10758
MongoDB mongo-express Remote Code Execution Vulnerability
7.5
CVE-2025-14847
Zlib compressed protocol header length confusion may allow memory read
9.8
CVE-2026-19001
MongoDB BI Connector ODBC driver may write outside an allocated buffer when handling oversized catalog object names
9.8
CVE-2025-3085
A MongoDB server under specific conditions running on Linux with TLS and CRL revocation status checking enabled, fails to check the revocation status of the intermediate…
9.8
CVE-2024-8654
MongoDB Server may access non-initialized region of memory leading to unexpected behaviour
