MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability

Technical Severity

CVSS v3.1 Metrics

HIGH

7.5 / 10

Minimal Risk Critical

Vector Specification

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

Exploitation Likelihood

EPSS Prediction

58.19 %

Predictive Probability

Percentile Rank

98.1 th

Documented as more likely to be exploited than 98.1% of known CVEs.

Detection Date

Dec 29, 2025

Remediation Due

Jan 19, 2026

CISA Catalog Active

Threat Analysis

MongoDB Server contains an improper handling of length parameter inconsistency vulnerability in Zlib compressed protocol headers. This vulnerability may allow a read of uninitialized heap memory by an unauthenticated client.

Remediation Directive

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

Asset Context

Vendor Identity

MongoDB

Affected Product

MongoDB and MongoDB Server

Ransomware Status

Campaign Use Unknown

Weakness Classification

CWE-130

External Intelligence

This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see:

https://jira.mongodb.org/browse/SERVER-115508

NVD

National Vulnerability Database

https://nvd.nist.gov/vuln/detail/CVE-2025-14847