> For the complete documentation index, see [llms.txt](https://doc.engenius.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.engenius.ai/engenius-cloud-esp/security-advisories/mongodb-server-security-update-december-2025.md). # MongoDB Server Security Update (December 2025)
CVE:CVE-2025-14847
Publication Date:2025-Dec-19
Severity:N/A
Reference:CVE-2025-14847
Status:Fixed
## Overview We have completed a comprehensive risk assessment regarding the December 2025 MongoDB Server Security Update. Based on a thorough review of our network infrastructure and security configurations, we have classified the overall risk to our environment as Low. Strict network isolation and ingress controls effectively neutralize the vulnerability against external threats. While a minor internal configuration gap was identified in EPC v1.8.7, it does not expose the system to the public internet and will be fully remediated in the upcoming release (v1.8.8). ## Technical details The identified vulnerability (associated with CVE-2025-14847, known as "MongoBleed") affects the MongoDB wire protocol's handling of zlib-compressed messages. It allows an unauthenticated remote attacker to exploit a disparity in packet length validation, potentially causing the server to return uninitialized heap memory containing sensitive data. However, the exploitability of this vulnerability is contingent upon establishing a direct network connection to the database port. Our infrastructure provides effective mitigation at the network layer: * Network Isolation: The MongoDB cluster is deployed within a strictly isolated private subnet, inaccessible from the public internet. * Ingress Controls: An audit of firewall rules and Security Groups confirms that no public ingress is permitted to the database ports (TCP 27017). * Port Separation: External-facing load balancers and application servers (ports 80, 443) do not possess direct routing or forwarding capabilities to the database layer, severing the attack chain ## Impact * **External Threat (Negligible)**: The attack vector requires direct connectivity to the database wire protocol. Since no such path exists from the public internet, external exploitation is effectively neutralized. * **Internal Exposure (Low)**: The open port in EPC v1.8.7 presents a minor internal exposure risk. This is strictly limited to the internal network context and does not facilitate data exfiltration to external actors. ## Mitigation and workarounds Upgrade EPC to v1.8.8 to fix this vulnerability. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation by asking a question. Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters: ``` GET https://doc.engenius.ai/engenius-cloud-esp/security-advisories/mongodb-server-security-update-december-2025.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.