# CVE-2025-14847

## Summary

- **CVE ID:** CVE-2025-14847
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-130
- **Published:** Dec 19, 2025
- **Last Modified:** Feb 26, 2026

## Description

Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.

## Affected Products

- MongoDB Inc. — MongoDB Server (8.2)
- MongoDB Inc. — MongoDB Server (8.0)
- MongoDB Inc. — MongoDB Server (7.0)
- MongoDB Inc. — MongoDB Server (6.0)
- MongoDB Inc. — MongoDB Server (5.0)
- MongoDB Inc. — MongoDB Server (4.4)
- MongoDB Inc. — MongoDB Server (4.2)
- MongoDB Inc. — MongoDB Server (4.0)
- MongoDB Inc. — MongoDB Server (3.6)

## References

- [CNA](https://jira.mongodb.org/browse/SERVER-115508)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847)
- [CVE](http://www.openwall.com/lists/oss-security/2025/12/29/21)
- [CVE](https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-server)
- [CVE](https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-server)
- [CVE](https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 83.22%
- **EPSS Percentile:** 99.7

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Dec 29, 2025
- **Due Date:** Jan 19, 2026

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._