External risk intelligence

WolfStack Authentication Bypass via Hard-coded Secret

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-73519

The vulnerability affects a management API endpoint that processes authentication headers. Such services are commonly deployed as network-accessible management interfaces or edge-facing services, making them reachable via the internet in many typical cluster and container management configurations.

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 details a critical security vulnerability in WolfStack technology where a hard-coded secret allows unauthenticated remote attackers to bypass authentication and execute arbitrary commands on the host system. The issue stems from a compiled-in secret that can be used to gain administrative access to container management functions.

Unauthenticated access to sensitive management functions.
Potential for full system compromise via command execution.
Confirm relevance and exposure to understand potential risk.

Attack Path

How an attacker could exploit the issue

An attacker can exploit this vulnerability by sending a special secret value in an HTTP header to bypass authentication on a management port. This initial access allows them to view all containers on the host and then execute arbitrary commands within any of them by targeting a specific API endpoint.

Unauthenticated network access required.
Bypass authentication using a hard-coded secret.
Execute arbitrary code as root inside containers.

Live Threat

Current exploitation, exposure, and threat context

A hard-coded cluster authentication secret can allow unauthenticated attackers to bypass security controls. When supported by the advisory, attackers could reach a node's management port to enumerate containers and execute arbitrary commands as root within any container.

System containers could be compromised.
Attackers could execute arbitrary commands.
Root access within containers may occur.

Operational Fix

Recommended remediation, mitigation, and detection steps

System administrators and platform teams are most likely responsible for addressing this vulnerability. The initial step is to confirm the presence and reachability of the affected technology, identify the accountable owner, and then prioritize remediation based on the risk assessment.

Identify affected systems and owners.
Verify external accessibility and business criticality.
Plan remediation based on risk assessment.

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 WolfStack?

WolfStack is a container management technology designed to orchestrate and oversee Docker and LXC containers on a host system. It provides administrative API endpoints that allow users to monitor container status and perform maintenance tasks directly on the host.

What is the security weakness in CVE-2026-73519?

This vulnerability is classified as CWE-798: Use of Hard-coded Credentials. The software includes a fixed authentication secret compiled directly into its source code. Because this secret is universal to all builds, any user who knows or discovers this value can use it to impersonate an administrator and bypass identity checks.

How do attackers trigger this vulnerability?

An attacker triggers the bug by sending a specific HTTP request to the WolfStack management port. They must include the hard-coded secret in the X-WolfStack-Secret header. This exploit works without needing a valid session, user account, or API key. It is not triggered by standard traffic that lacks this specific header.

Why should I care about this vulnerability?

According to Halo Surface Signal, this vulnerability is classified as 'Likely' to be accessible because it affects management API endpoints. If your WolfStack management port is exposed to the internet, remote attackers can bypass authentication to enumerate your containers and execute commands as root, leading to potential system compromise.

How should I respond to this threat?

If you operate WolfStack, immediately identify all running instances and verify their network accessibility. Prioritize restricting access to the management port so it is not reachable from untrusted networks. Engage with your platform team to confirm if your current version is affected and plan for an update to a version beyond 25.9.2.

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.