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CVE Watch10 nov 2026

CVE-2026-120809

A use-after-free read issue exists in MongoDB’s SBE (Slot-Based Execution) engine when processing aggregation pipelines with $unwind on time

CVSS

6.8

Medio

EPSS

—

KEV

—

Exploit Today

0

0-100

Publicado: 10 nov 2026 · Última mod.: 10 nov 2026 · CWE-416

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

A use-after-free read issue exists in MongoDB’s SBE (Slot-Based Execution) engine when processing aggregation pipelines with $unwind on time-series collections. An internal error in state-preservation logic can cause a value still referenced by downstream stages to have its underlying memory freed prematurely. An authenticated user can craft an aggregation pipeline under specific conditions to trigger this condition, potentially reading recycled server heap memory in query results or crashing the server. This issue is only triggerable when a non-default server parameter related to the SBE engine is enabled.

Referencias oficiales

jira.mongodb.orghttps://jira.mongodb.org/browse/SERVER-132279

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