VDB-337608 · CVE-2025-14847 · SERVER-115508

MongoDB Server up to 8.2.2 Zlib Protocol Header message_compressor_zlib.cpp decompressData length MongoBleed length parameter

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in MongoDB Server up to 8.2.2. The impacted element is the function ZlibMessageCompressor::decompressData of the file src/mongo/transport/message_compressor_zlib.cpp of the component Zlib Protocol Header Handler. The manipulation of the argument length results in length parameter. This vulnerability was named CVE-2025-14847. The attack may be performed from remote. In addition, an exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in MongoDB Server up to 8.2.2. Affected is the function ZlibMessageCompressor::decompressData of the file src/mongo/transport/message_compressor_zlib.cpp of the component Zlib Protocol Header Handler. The manipulation of the argument length with an unknown input leads to a length parameter vulnerability. CWE is classifying the issue as CWE-130. The product parses a formatted message or structure, but it does not handle or incorrectly handles a length field that is inconsistent with the actual length of the associated data. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at jira.mongodb.org. This vulnerability is traded as CVE-2025-14847 since 12/17/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 279586 (Linux Distros Unpatched Vulnerability : CVE-2025-14847), which helps to determine the existence of the flaw in a target environment. This issue was added on 12/29/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 01/19/2026:

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

Upgrading to version 4.4.30, 5.0.32, 6.0.27, 7.0.28, 8.0.17 or 8.2.3 eliminates this vulnerability. Applying the patch 505b660a14698bd2b5233bd94da3917b585c5728 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (279586), EUVD (EUVD-2025-204529) and CERT Bund (WID-SEC-2025-2905). Further details are available at tenable.com. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

Open Source MongoDB

Productinfo

Type

Database Software

Vendor

MongoDB

Name

Server

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (mongodb): 🔒

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Length parameter
CWE: CWE-130 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Attacked
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

KEV Added: 🔒
KEV Due: 🔒
KEV Remediation: 🔒
KEV Ransomware: 🔒
KEV Notice: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 279586
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-14847

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Server 4.4.30/5.0.32/6.0.27/7.0.28/8.0.17/8.2.3
Patch: 505b660a14698bd2b5233bd94da3917b585c5728