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CVE-2025-14847

7.5, high Known exploited

MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
7.5, high high CVSS v3.1
EPSS, next 30 days
83% higher than 99.6% of scored CVEs
Exploitation
Confirmed in the wild
Published
19 Dec 202510 months ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 29 Dec 2025. US federal agencies had to remediate by 19 Jan 2026, a deadline that has passed.

Required action. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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.

Details

Vendor
MongoDB
Product
MongoDB Server
Weakness
CWE-130 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cna@mongodb.com

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References 6

Exploit code 2

Patches and fixes 1

Advisories 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other MongoDB CVEs

Every MongoDB CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2019-10758 MongoDB mongo-express Remote Code Execution Vulnerability KEV EPSS 85% 9.9, critical
  • CVE-2026-106432 The BSON encoder in the MongoDB PHP Driver converts a string length to a 32-bit value without validation EPSS 0.2% 8.2, high
  • CVE-2026-88027 Improper neutralization of special elements in data query logic in the embedded-document relation handling of the MongoDB integration… EPSS 0.3% 8.1, high
  • CVE-2026-88032 MongoDB Java Driver Use-After-Free Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-88033 Improper neutralization of special elements in data query logic in the GridFS component of the MongoDB Java Driver can cause a… EPSS 0.5% 8.3, high
  • CVE-2026-82066 MongoDB Server Out-of-Bounds Read Vulnerability EPSS 0.4% 8.1, high
  • CVE-2026-84964 MongoDB C Driver Double Free Vulnerability EPSS 0.3% 7.5, high
  • CVE-2026-75159 MongoDB BI Connector Double Free Vulnerability EPSS 0.3% 7.5, high

Beyond this page

Is CVE-2025-14847 in your network?

This page tells you how dangerous CVE-2025-14847 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2025-14847 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2025-14847 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.