{"id":"CVE-2026-120803","published":"2026-11-10T20:18:50.420","lastModified":"2026-11-10T22:08:59.707","description":"A use-after-free issue exists in MongoDB’s SBE (Slot-Based Execution) implementation of a window function accumulator used by certain $setWindowFields aggregation pipelines. Under specific conditions, the accumulator can retain a dangling pointer to memory that has since been freed. When this stale pointer is later dereferenced during serialization of the carried-forward value, it can result in a heap out-of-bounds read that may expose adjacent heap contents and crash the mongod server. An authenticated user with readWrite privileges on a database can trigger this issue by crafting a specific aggregation pipeline.","cvssScore":7.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H","cwes":["CWE-416"],"vendors":[],"products":[],"references":[{"url":"https://jira.mongodb.org/browse/SERVER-135180","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}