External risk intelligence

Cash Collect Sage AR Automation API Improper Authorization

CVE advisorySeverity: CRITICAL (CVSS 9.0)

CVE-2026-67403

The vulnerability exists in an API for an automation product that is inherently designed to be accessed over the network to facilitate business processes, making it a likely candidate for public-facing or external-facing service deployment.

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

An improper authorization vulnerability has been identified in the Sage AR Automation API, allowing authenticated users to access administrative resources of other tenants. This issue stems from insufficient tenant-level authorization checks within the system. The primary concern is to confirm if your organization utilizes this specific technology and assess any potential exposure.

  • Users can access other tenants' data.
  • Critical to confirm if your business uses this system.
  • Understand potential exposure and relevance.

Attack Path

How an attacker could exploit the issue

Attackers with limited privileges can access sensitive administrative data from other accounts by exploiting an authorization flaw in the Cash Collect Sage AR Automation API. This occurs when an attacker guesses or discovers a tenant identifier to bypass intended access controls. If successful, an attacker could potentially read, modify, or delete critical business information across different tenants.

  • Authenticated user access required.
  • Guessing tenant ID bypasses authorization.
  • Unauthorized access to other tenants' data.

Live Threat

Current exploitation, exposure, and threat context

Authenticated users could access sensitive administrative resources from other tenants within Cash Collect when supported by the advisory. This vulnerability impacts the Sage AR Automation API, potentially exposing configuration or operational data across different customer accounts.

  • Tenant administrative resources could be accessed.
  • Via API calls with a predictable tenant identifier.
  • Unauthorized access to other tenant data.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in the Sage AR Automation API likely requires coordination between the application owners responsible for Cash Collect and the infrastructure or platform teams managing the API endpoints. The first practical step is to identify all instances of the affected API, confirm its exposure and criticality, and then assign ownership for remediation planning.

  • Application and platform teams own remediation.
  • Verify API reachability and business criticality.
  • Plan tenant-level access control review.

Supplementary metadata

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.

Frequently asked questions

What is the Cash Collect Sage AR Automation API?

Cash Collect is a software component integrated into Sage AR Automation. It serves as a centralized platform for managing accounts receivable, automating billing, and streamlining payment collection processes. Organizations use this technology to digitize their financial workflows, ensuring that sensitive customer billing data and administrative configurations are handled through connected web-based services.

What does improper authorization mean for CVE-2026-67403?

This vulnerability is classified as CWE-639, or Authorization Bypass Through User-Controlled Key. In simple terms, the system fails to properly verify that a user is allowed to access the specific account or 'tenant' they are requesting. Because the API does not strictly enforce these boundaries, a user logged into their own account can interact with administrative resources belonging to a different customer.

How can an attacker trigger this vulnerability?

An attacker needs an existing authenticated account within the system to interact with the API. The trigger occurs when they submit a request to the API while specifically targeting a different tenant identifier. Accessing resources that belong to your own organization does not trigger the bug; the vulnerability is only activated when a user successfully reaches across the partition into an account they do not own.

Why should I be concerned about this if I use this service?

According to Halo Surface Signal, this API is designed for network-based business automation, making it a likely candidate for external-facing deployments. Because it is reachable over the network, the risk is higher for organizations that expose these endpoints publicly. If an attacker identifies a valid tenant ID, they could potentially read, modify, or delete sensitive business information stored within those administrative accounts.

What are the first steps to address this issue?

Start by confirming whether your organization uses the Sage AR Automation API. If you do, coordinate with the teams that manage your platform infrastructure to inventory all reachable API endpoints. Once you have identified your instances, prioritize verifying your current access control configurations and work with the service owner to plan for the necessary authorization updates.

References