External risk intelligence

Streambert Arbitrary Local Binary Execution Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 10.0)

CVE-2026-48056

The vulnerability exists within a desktop application and requires a compromised renderer process to execute arbitrary local binaries. This is a client-side execution issue limited to the local environment and lacks exposure to the public internet as a network service or reachable interface.

Halo Surface Signal: 1 out of 5 — much less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability has been identified in the Streambert desktop application that could allow a compromised renderer process to execute arbitrary local programs using the application's permissions. This affects versions prior to 2.5.0. The main concern is confirming relevance and exposure.

The app can run unauthorized local programs.
Consider if this app is used within your environment.
Verify if this application is used or deployed.

Attack Path

How an attacker could exploit the issue

An attacker with the ability to control a renderer process within the Streambert application can trick it into running local programs. This is possible because the application doesn't properly check the file paths it's told to execute for downloads, allowing a malicious renderer to command the application to run unintended local code. If successful, an attacker could achieve significant control over the user's machine.

Requires a compromised renderer process.
Vulnerable IPC handler for executable paths.
Arbitrary local binary execution.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, a compromised renderer process within the Streambert desktop application could execute arbitrary local binaries with the application's privileges. This may affect local system data and service behavior.

Local binaries on the system.
Arbitrary code execution.
Compromised application privileges.

Operational Fix

Recommended remediation, mitigation, and detection steps

Understanding who should act requires identifying the teams responsible for the Streambert application, which includes application owners and potentially platform or infrastructure teams if it's part of a broader service offering. The first practical step is to inventory all instances of Streambert, determine their reachability and criticality, and then engage the accountable owner to plan remediation.

Application owners should own this issue.
Verify Streambert instances and their reachability.
Plan remediation based on identified risks.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is the Streambert application?

Streambert is a cross-platform desktop application built on Electron, a framework used to create desktop software using web technologies. It is primarily designed for streaming and downloading video content. Because it functions as a desktop client, it operates with the permissions of the user logged into the host computer.

What does CWE-20 and CWE-749 mean for CVE-2026-48056?

These codes represent weakness classes. CWE-20 refers to improper input validation, while CWE-749 specifically flags the unsafe exposure of dangerous APIs. In the context of CVE-2026-48056, this means the application fails to properly verify file paths sent to its internal download handler, inadvertently allowing that handler to trigger the execution of local programs instead of just downloading content.

How is this vulnerability triggered?

An attacker must first compromise the application's renderer process to send malicious commands to the vulnerable IPC handler. Simply browsing or downloading legitimate content does not trigger this issue. The vulnerability is specifically dependent on an attacker successfully tricking the internal communication system into executing a local binary path that the application should not be accessing.

Is my system at risk if Streambert is not internet-facing?

According to Halo Surface Signal, the risk is classified as very unlikely for network-based attacks because this is a client-side issue. The vulnerability requires a compromised local process to function, rather than an exposed network service. Therefore, whether the application is internet-facing or internal is less relevant than the local security of the device where it is installed.

What steps should I take if I use Streambert?

The primary step is to verify which version of the software you are running. If you are using any version prior to 2.5.0, you are affected by this vulnerability. You should update to version 2.5.0, which contains the necessary patch to properly validate executable paths and prevent unauthorized binary execution. Confirming your version and applying the update is the most effective way to secure your environment.

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.