CVE-2026-19583 in Velociraptor
Summary
by MITRE • 09/10/2026
Velociraptor allows some sensitive artifacts to be gated by additional permissions. For example, the Linux.Sys.BashShell artifact allows arbitrary command execution on endpoints, and so it requires the EXECVE permission to schedule. However, no such check was implemented for client monitoring artifacts. Additionally there was no requirement that client monitoring artifacts carry the CLIENT_EVENTS type. This allows any user who can schedule client monitoring artifacts to also schedule otherwise restricted artifacts (such as Linux.Sys.BashShell).
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Analysis
by VulDB Data Team • 09/10/2026
The vulnerability in Velociraptor represents a critical authorization bypass within its artifact scheduling mechanism, specifically affecting the distinction between standard operational tasks and high-privilege actions. Velociraptor is designed with a granular permission model where sensitive artifacts are gated by specific permissions to prevent unauthorized access or execution of powerful commands. For instance, the Linux.Sys.BashShell artifact, which permits arbitrary command execution on endpoints, correctly requires the EXECVE permission for scheduling. This ensures that only users with elevated privileges can execute shell commands remotely. However, a logical flaw exists in how client monitoring artifacts are processed during this authorization check. The system fails to enforce the same strict permission requirements for these monitoring-based tasks, creating a significant security gap that undermines the intended access control policies.
The core technical flaw lies in the absence of proper validation logic when handling client monitoring artifacts. Specifically, there is no requirement that such artifacts carry the CLIENT_EVENTS type designation, which serves as an identifier to distinguish them from other artifact categories. Because this check is missing, any user who possesses the basic permission to schedule a generic client monitoring artifact can inadvertently or intentionally trigger the execution of restricted artifacts like Linux.Sys.BashShell. This occurs because the system does not adequately segregate the permissions required for different types of operations when they are initiated through the monitoring interface. The lack of type enforcement allows lower-privileged users to escalate their capabilities by exploiting this loophole, effectively bypassing the EXECVE permission requirement that should protect sensitive command execution functions.
From an operational impact perspective, this vulnerability poses a severe risk to endpoint security and data integrity. An attacker or malicious insider with limited access rights could leverage this flaw to execute arbitrary commands on managed endpoints. This capability allows for complete system compromise, including the exfiltration of sensitive data, installation of persistent backdoors, lateral movement across the network, and disruption of critical services. Since Velociraptor is often deployed in enterprise environments where it holds significant control over endpoint configurations and monitoring capabilities, this bypass effectively grants unauthorized administrators full root-level access to potentially thousands of systems without detection or proper audit trails reflecting the true privilege level required for such actions.
This issue aligns with CWE-269, which describes Improper Privilege Management, as the application fails to enforce appropriate authorization levels for specific functions. Furthermore, it relates to ATT&CK technique T1053, specifically Scheduled Task/Job, where an adversary might use legitimate system tools or management frameworks to execute malicious commands under the guise of routine monitoring activities. The vulnerability highlights a common challenge in security tooling where convenience features like flexible artifact scheduling can introduce complex authorization logic errors if not rigorously tested against privilege escalation scenarios.
To mitigate this risk, immediate updates to the Velociraptor software are required to enforce strict type checking for all scheduled artifacts. Developers must ensure that any artifact designated as a client monitoring task explicitly carries the CLIENT_EVENTS type and is subject to the same rigorous permission checks as other high-privilege operations. Additionally, implementing role-based access control enhancements would help segregate duties between users who need to monitor system health and those authorized to execute administrative commands. Regular security audits of custom artifacts should also be conducted to verify that no new or modified artifacts inadvertently bypass existing authorization gates. Until patched, organizations should restrict the ability to schedule any client monitoring artifacts to only highly trusted administrators with verified EXECVE permissions, thereby closing the privilege escalation pathway until a permanent fix is deployed.