External risk intelligence

MuseBot Authentication Bypass Via Hard-Coded Session Key

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-119660

MuseBot includes an administrative interface that handles authentication. Web applications featuring administrative panels that manage users, configurations, and system operations are commonly deployed as internet-facing services or portals to allow for remote management, making this surface likely to be reachable from the internet.

Authentication Bypass

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 advisory concerns a vulnerability in MuseBot, a technology that manages automated tasks or digital assistants, allowing unauthorized users to gain administrative control. This is accomplished by exploiting a default, hard-coded session key, which bypasses standard security checks. High-level implications include potential access to sensitive information and control over the system's operations.

Bypass security to gain admin access.
Hard-coded key allows unauthorized control.
Confirm if MuseBot is deployed internally.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker can exploit this vulnerability by sending a specially crafted request to the MuseBot application. By leveraging a hard-coded session key, the attacker can forge an administrative session, gaining unauthorized access to sensitive data and system controls.

No prior access needed.
Forge administrative session using hard-coded key.
Full administrative access and data exposure.

Live Threat

Current exploitation, exposure, and threat context

An unauthenticated attacker could gain full administrative access to MuseBot by forging an admin session using a hard-coded session key. This could lead to the exposure of sensitive information and unauthorized control over the bot's operations, when supported by the advisory.

Reading password hashes and chat records.
Forging admin sessions to control bots.
Unauthorized access to bot configurations.

Operational Fix

Recommended remediation, mitigation, and detection steps

The critical authentication bypass in MuseBot affects administrative functions, suggesting that application owners or platform teams managing the MuseBot deployment are likely responsible for addressing this. The immediate first step is to identify all instances of MuseBot within the environment, ascertain their exposure, and confirm the accountable owner for each. Once identified, a risk-based remediation plan can be developed, potentially involving vendor coordination or temporary mitigations if immediate patching is not feasible.

Verify MuseBot instances and exposure.
Identify accountable application owners.
Plan risk-based remediation.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

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Frequently asked questions

What is MuseBot and what is it used for?

MuseBot is a software application designed to manage automated tasks and digital assistants. It includes an administrative interface that allows operators to oversee system operations, handle user accounts, and configure bot settings, functioning as a control panel for automated workflows.

What kind of vulnerability is CVE-2026-119660?

This vulnerability is an authentication bypass, classified under CWE-1394. It occurs because the software uses a hard-coded, default session key. Because this key is built directly into the code, it allows an attacker to bypass the normal login process and falsely authenticate as an administrator.

How does an attacker trigger this MuseBot vulnerability?

An attacker can gain unauthorized access by crafting a specific web request to the MuseBot application. By signing a session cookie with the known hard-coded key, they can impersonate an administrator. This flaw does not require any prior system access or valid credentials; it is triggered solely by knowing the static key included in the software.

Do I need to worry about MuseBot if it is not on the internet?

Halo Surface Signal indicates that because MuseBot manages sensitive administrative panels, these are often exposed to the internet for remote access, which increases risk. However, you should assess your specific environment; if a MuseBot instance is strictly internal and unreachable from the internet, it faces a different threat profile than one exposed publicly.

What should I do first to address this security risk?

Your first step is to locate all instances of MuseBot running in your infrastructure to determine which are active and who is responsible for them. Once you have a full inventory, confirm the network exposure of each instance and begin planning for an update to version 2.0.0 or later to remove the hard-coded key.

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.