CVE-2026-4148 — ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators

CVE-2026-4148

ExpressionContext use-after-free in classic engine $lookup and $graphLookup aggregation operators PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
MongoDB Inc / MongoDB Server	affected 8.2 before 8.2.6; affected 8.0 before 8.0.20; affected 7.0 before 7.0.31

CWE

CWE-416

References

https://jira.mongodb.org/browse/SERVER-119319

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.