CVE-2026-88034

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ Driver

6.1 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: High
Availability: High

Exploit likelihood

0.46%Up 0.2 points since Sep 11, 2026

What each source reports

CVE List Score used 6.1

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ Driver

Record: CVE-2026-88034
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Weakness: CWE-943
Updated: 2026-11-02

EUVDEUVD-2026-75670 6.1

Record: EUVD-2026-75670
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-x33j-9628-wvwc 6.1

Improper neutralization of special elements in data query logic in the GridFS component of the...

Record: GHSA-x33j-9628-wvwc
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Weakness: CWE-943
Updated: 2026-11-02

NVD 6.1

Record: CVE-2026-88034
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Weakness: CWE-943
Updated: 2026-11-02

OSV 6.1

GridFS data disclosure and deletion via query-operator injection in file IDs in the MongoDB C++ Driver

Record: CVE-2026-88034
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-943
Updated: 2026-11-02

OSVDEBIAN-CVE-2026-88034 6.1

Record: DEBIAN-CVE-2026-88034
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-88034 6.1

Record: UBUNTU-CVE-2026-88034
CVSS 4.0: 6.1 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.3 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mongo-cxx-driver` Debian:14	before 4.5.3-1, plus listed versions 3.10.1-13.10.2-13.11.0-13.4.1-13.6.0-1 Show 17 moreShow less 3.6.1-13.6.2-13.6.3-13.6.5-13.6.6-13.6.7-13.7.0-13.7.1-13.8.0-13.8.1-13.9.0-14.0.0-14.1.4-14.4.0-14.5.0-14.5.1-14.5.2-1	4.5.3-1
`mongo-cxx-driver` Ubuntu:26.10	All versions, plus listed versions 4.4.0-14.5.0-1	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-88034 is a medium vulnerability (CVSS 6.1) in Mongodb C++ Driver, published September 10, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 39th percentile. Fixed in mongo-cxx-driver 4.5.3-1.