External risk intelligence

cc-connect MAX Platform Missing Authentication in Webhook Mode

CVE advisorySeverity: CRITICAL (CVSS 9.2)

CVE-2026-108549

The vulnerability exists in a webhook listener that is designed to accept external updates via a network port (8080). Webhook endpoints are commonly exposed to the internet or reachable across network boundaries to facilitate integration with external services, making them a common target for network-based interaction.

Missing Authentication

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

A vulnerability has been identified in a component that handles platform adapter integrations, specifically within its webhook mode. This issue allows unauthenticated remote attackers to potentially execute privileged commands on the host system by bypassing authentication when a secret is not configured. The main concern at this time is confirming relevance and exposure to our environment.

Unauthenticated access allows running commands.
Remote attackers can exploit this via network.
Confirm if our systems are connected and exposed.

Attack Path

How an attacker could exploit the issue

Attackers can reach a webhook listener exposed on port 8080 to send unauthenticated updates. When the webhook secret is not configured, this allows remote attackers to impersonate allowed or admin users, potentially leading to the execution of privileged commands on the host system.

Entry condition: Network access to webhook listener.
Trigger point: Unauthenticated webhook updates.
Resulting risk: Arbitrary command execution.

Live Threat

Current exploitation, exposure, and threat context

When the MAX platform adapter webhook mode is not configured with a `webhook_secret`, remote attackers could forge updates. This could allow them to execute privileged commands on the host system, such as `/shell`, by impersonating an allowed or admin user.

Host system commands.
Unauthenticated webhook updates.
Privileged command execution.

Operational Fix

Recommended remediation, mitigation, and detection steps

The cc-connect MAX platform adapter webhook mode's missing authentication vulnerability is likely to impact application owners and potentially infrastructure or platform teams responsible for the services running on port 8080. The first practical step is to identify all instances of cc-connect, determine their reachability and business criticality, and then locate the accountable owner for remediation planning.

Identify and confirm affected applications.
Verify webhook endpoint reachability and criticality.
Plan remediation with accountable owners.

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 cc-connect and the MAX platform adapter?

cc-connect is a software package that provides integration tools. The MAX platform adapter is a specific component within it that uses a webhook mode to receive updates from external services. This adapter acts as a bridge for communication, allowing the platform to process incoming data or events sent to a configured listener.

What is the vulnerability in CVE-2026-108549?

This CVE involves a missing authentication weakness, classified as CWE-306. In plain terms, the software fails to verify that a request is coming from a legitimate source. Because the webhook listener does not require proof of identity when no secret is configured, the system incorrectly trusts incoming network requests and processes them as if they were authorized administrative commands.

How does an attacker trigger this vulnerability?

An attacker must be able to reach the webhook listener, which runs on port 8080. The vulnerability is triggered when the software is running in webhook mode without a 'webhook_secret' configured. Importantly, simply having the software installed does not trigger the bug; it requires the specific combination of missing secret configuration and network reachability to the listener.

Why should I care about this vulnerability?

According to Halo Surface Signal, this issue is considered likely to impact systems because webhook listeners are frequently designed to be reachable across network boundaries or even exposed to the internet. If your instance is reachable over the network, it faces a higher risk of being targeted by unauthorized users attempting to forge commands.

How do I start addressing CVE-2026-108549?

Begin by inventorying your environment to locate all instances where cc-connect is deployed. Once identified, verify if the MAX platform adapter is active and listening on port 8080. If it is in use, determine if a webhook secret is currently configured. Finally, engage the service owners to assess the business impact and prioritize necessary security adjustments.

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.