CVE-2026-115516 in Business Hub SaaS
Summary
by MITRE • 10/23/2026
An incorrect authorization issue exposes basic account information to unauthorized remote users in KNIME Business Hub SaaS before version 1.19.0. A workaround is not possible.
The same behaviour is present in on-premise KNIME Business Hub installations but it was designed as such in order to foster collaboration in isolated local environments. No information that is not already know within the company is exposed. If required, basic account information can also be turned off via configuration in on-premise installations.
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Analysis
by VulDB Data Team • 10/23/2026
The vulnerability identified in KNIME Business Hub SaaS prior to version 1.19.0 represents a critical failure in access control mechanisms, specifically categorized under CWE-284 Improper Access Control. This flaw allows unauthorized remote users to retrieve basic account information that should be restricted to authenticated and authorized personnel within the organization. The core technical issue stems from an incorrect authorization check implemented within the application's backend logic or API endpoints responsible for serving user profile data. Instead of validating whether the requesting entity possesses the necessary privileges to view specific account details, the system fails to enforce these restrictions effectively in a multi-tenant Software as a Service environment. This oversight results in sensitive metadata being exposed over the network to any remote actor who can reach the service endpoint, bypassing intended security boundaries.
The operational impact of this vulnerability is significant due to its potential role in facilitating further attacks against the organization's infrastructure and personnel. While basic account information such as usernames or email addresses may seem innocuous in isolation, it serves as valuable reconnaissance data for threat actors engaged in social engineering campaigns. Attackers can leverage this exposed data to craft highly targeted phishing emails that appear legitimate because they reference actual employee names and roles within the company. This significantly increases the success rate of credential harvesting attempts which are often the initial vector for more severe compromises such as ransomware deployment or data exfiltration. Furthermore, in a SaaS context where multiple organizations may share underlying infrastructure resources, this exposure could potentially allow cross-tenant information leakage if isolation mechanisms between tenants rely on similar flawed authorization logic, although the primary risk remains internal to each tenant's user base being exposed externally.
It is important to distinguish this issue from its behavior in on-premise deployments of KNIME Business Hub. In local installations, the same technical mechanism was intentionally designed as such to facilitate collaboration among users within an isolated network environment where trust boundaries are defined by network access rather than strict identity-based authorization checks for every endpoint. Consequently, no information outside what is already known within the company's perimeter is exposed in on-premise scenarios. For organizations running local instances who wish to enforce stricter controls, basic account information visibility can be disabled through specific configuration settings provided by the software vendor. However, this mitigation path does not apply to SaaS customers due to the shared nature of the service and the necessity for certain collaborative features that rely on visible user identities across different organizational boundaries within the platform ecosystem.
To mitigate this vulnerability in SaaS environments, immediate action is required as no workaround exists other than upgrading the software version. Administrators must ensure their KNIME Business Hub instance is updated to version 1.19.0 or later where these authorization checks have been corrected and hardened against unauthorized access attempts. This update addresses the root cause by implementing proper validation of user permissions before serving account data, thereby aligning with industry best practices for secure API design as outlined in OWASP guidelines regarding broken object level authorization. Organizations should also conduct a review of their existing security posture to identify any potential exploitation that may have occurred prior to the patch deployment. Monitoring logs for unusual access patterns to user profile endpoints can help detect if attackers successfully exploited this flaw before remediation was applied, allowing for timely incident response measures such as password resets or enhanced monitoring for subsequent phishing attempts targeting exposed accounts.