Is CVE-2026-4148 actively exploited?

CVE-2026-4148 has no public evidence of in-the-wild exploitation as of 2026-04-10.

What is the CVSS score for CVE-2026-4148?

CVE-2026-4148 has a CVSS score of 8.7 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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.

How do I patch CVE-2026-4148?

Patch guidance is available from mongodb security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-4148.

Fix CVE-2026-4148 - HIGH mongodb mongodb

Q: Which products are affected by CVE-2026-4148?

8 products: mongodb mongodb, mongodb mongodb, mongodb mongodb, mongodb mongodb, mongodb mongodb, and 3 more.

Description

A use-after-free vulnerability can be triggered in sharded clusters by an authenticated user with the read role who issues a specially crafted $lookup or $graphLookup aggregation pipeline.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-416 · Use After Free

Metadata

Primary Vendor: MONGODB
Published: 3/17/2026
Last Modified: 4/10/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mongodb : mongodbmongodb : mongodbmongodb : mongodbmongodb : mongodbmongodb : mongodbmongodb : mongodbmongodb : mongodbmongodb : mongodb

Remediation Guidance

Executive Summary

View on NIST NVD