# CVE-2026-9753

## Summary

- **CVE ID:** CVE-2026-9753
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-1287
- **Published:** Jun 9, 2026
- **Last Modified:** Jun 10, 2026

## Description

The $_internalApplyOplogUpdate aggregation pipeline stage can be used to execute a document diff containing a malformed binary diff to return memory out-of-bounds or crash the server. $_internalApplyOplogUpdate can be executed by any authenticated user with access to the aggregate command.

## Affected Products

- MongoDB — MongoDB Server (8.3.0)
- MongoDB — MongoDB Server (8.2.0)
- MongoDB — MongoDB Server (8.0.0)
- MongoDB — MongoDB Server (7.0.0)

## References

- [CNA](https://jira.mongodb.org/browse/SERVER-124959)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 22.1

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._