External risk intelligence

Ground Station SSRF via Unauthenticated Socket.IO Configuration Access.

CVE advisorySeverity: CRITICAL (CVSS 9.2)

CVE-2026-53983

The vulnerability exists in a Socket.IO service listening on port 7000 that allows unauthenticated client connections. Such services, often used for real-time data handling or management interfaces, are frequently exposed to the network or internet to facilitate remote client communication, making them a likely target for remote interaction in many common deployment patterns.

Server-Side Request Forgery

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This vulnerability affects a ground station system, allowing unauthenticated users to send malicious links that could be used to probe internal networks or cloud metadata. The system then provides feedback on these probes, enabling attackers to map internal services or discover sensitive cloud information. The main concern is confirming relevance and exposure.

Unauthenticated users can force the system to test attacker-provided links.
Attacker can learn about internal systems or cloud metadata.
Confirm if this system is used and if it is exposed externally.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can exploit this vulnerability by connecting to a Socket.IO server and sending specially crafted data. This allows the attacker to manipulate the server into making outbound HTTP requests to arbitrary destinations, potentially revealing internal network information or interacting with cloud metadata services. The vulnerability persists and can trigger repeatedly even after the attacker disconnects.

No authentication required to connect.
Server sends requests to attacker-chosen URLs.
Information disclosure and server-side attacks.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to trick the ground-station process into making outbound HTTP requests to arbitrary destinations. This could be used to probe internal network resources or cloud instance metadata, as the system reveals HTTP status codes and error messages from these requests. The malicious configuration persists across restarts and will re-trigger the sync cycle every 24 hours.

System data and internal network access at risk.
Unauthenticated clients can trigger requests to attacker-chosen URLs.
Reconnaissance of internal services and cloud metadata is possible.

Operational Fix

Recommended remediation, mitigation, and detection steps

The application owner and platform team are likely responsible for addressing this unauthenticated server-side request forgery vulnerability. The first practical step is to identify all instances of the affected technology, confirm their reachability and business criticality, and then engage the accountable owner to plan remediation.

Determine application and platform ownership.
Verify all deployed instances are inventoried.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

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Frequently asked questions

What is Ground Station software used for?

Ground Station is a specialized system designed to manage and synchronize orbital data. It handles real-time communications through a Socket.IO interface, which processes tasks like orbital-source configuration. This software is essential for organizations tracking satellite or aerospace information, as it coordinates the automated retrieval and persistence of orbital data sources across scheduled sync cycles.

What does CVE-2026-53983 mean for security?

CVE-2026-53983 is a Server-Side Request Forgery (SSRF) vulnerability. It occurs because the software lacks authentication and input validation. Essentially, it allows an unauthenticated user to trick the server into making unintended web requests. By submitting a malicious URL, an attacker can cause the server to probe internal network resources or cloud-based metadata services that are normally hidden from the public internet.

How does an attacker trigger this SSRF vulnerability?

An attacker connects to the Socket.IO server on port 7000 without needing credentials. They send a specific data_submission event to save a target URL in the application database, followed by a background_task:start event to execute the request. This bug is triggered by the application's process itself, meaning it does not require the attacker to remain connected to the server after the malicious configuration has been successfully saved.

Why does Halo Surface Signal flag this as likely relevant?

Halo Surface Signal identifies this as likely relevant because the affected Socket.IO service operates on port 7000, which is frequently exposed to facilitate remote monitoring or data management. If your Ground Station instance is accessible from the network or the internet, it becomes a potential target. The vulnerability is particularly significant because it allows attackers to reach internal-only addresses, such as sensitive cloud metadata endpoints.

What are the first steps to secure my Ground Station instance?

Begin by creating a complete inventory of all Ground Station instances currently deployed in your environment. Once identified, determine which instances are network-accessible and prioritize them for remediation. You should coordinate with the platform team to restrict access to port 7000 and ensure your team is prepared to update to version 0.6.0 or higher once the official fix is available to properly enforce authentication requirements.

References

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.