CVE-2026-4148 — Use After Free in INC Mongodb Server

CWE-416 — Use After Free5 documents5 sources
Severity
8.7HIGHNVD
EPSS
0.1%
top 84.61%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mongodb INC Mongodb ServerMongodb
Timeline
PublishedMar 17

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 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

Affected Packages2 packages

▶NVDmongodb/mongodb7.0.0 — 7.0.31+3
▶CVEListV5mongodb_inc/mongodb_server8.2 — 8.2.6+2

Patches

Patch: jira.mongodb.org ↗

🔴Vulnerability Details

3
CVEList
ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators↗2026-03-17
▶
OSV
CVE-2026-4148: 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↗2026-03-17
▶
GHSA
GHSA-5rch-679r-cv33: 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↗2026-03-17
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-4148 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-4148 — Use After Free in INC Mongodb Server | cvebase