EUVD-2026-12639

A specially crafted aggregation query with $lookup by an authenticated user with write privileges can cause a double-free or use-after-free memory issue in the slot-based execution SBE engine when an in-memory hash table is spilled to disk...

UBUNTU-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 or $graphLookup aggregation pipeline...

PT-2026-25937

Name of the Vulnerable Software and Affected Versions MongoDB affected versions not specified Description A specially crafted aggregation query utilizing the $lookup operator, submitted by an authenticated user possessing write privileges, can lead to a double-free or use-after-free memory issue...