CVE-2026-117466 in Octopus Server
Summary
by MITRE • 10/27/2026
In affected versions of Octopus Server, a user holding the System Manager role could escalate their privileges to full system Administrator.
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Analysis
by VulDB Data Team • 10/27/2026
The vulnerability identified in Octopus Server represents a critical privilege escalation flaw that allows users with the System Manager role to elevate their access rights to those of a full system administrator. This type of security issue is fundamentally rooted in improper authorization controls, where the application fails to enforce restrictive policies on administrative functions or configuration changes available to lower-privileged roles. In many enterprise deployment scenarios, the distinction between different levels of administrative privileges is crucial for maintaining the principle of least privilege and ensuring robust operational security. When this boundary is breached, it undermines the entire access control model implemented within the software environment.
From a technical perspective, such vulnerabilities often arise from insufficient validation of user permissions during critical operations or API calls that modify system-wide settings. A System Manager typically possesses significant capabilities related to tenant management, project configuration, and deployment processes, but should not have unrestricted access to core server infrastructure configurations, security policies, or internal service accounts. The flaw likely involves a logic error where the application incorrectly assumes that certain administrative actions are safe for higher-level managers or fails to check specific permission flags before executing privileged commands. This allows an attacker who has compromised a System Manager account, or gained initial foothold through other means such as credential theft, to bypass intended restrictions and gain complete control over the Octopus Server instance.
The operational impact of this vulnerability is severe due to the central role that Octopus Deploy plays in many DevOps pipelines. Full system administrator access grants the ability to modify deployment targets, alter security certificates, manage service accounts used for deployments, and potentially execute arbitrary code on the server hosting the application. If an attacker gains this level of control, they can intercept or manipulate software releases, inject malicious artifacts into build processes, exfiltrate sensitive configuration data including database connection strings and API keys, and establish persistent backdoors within the CI/CD infrastructure. This compromises not only the Octopus Server itself but also all downstream systems that rely on it for automated deployments, potentially leading to widespread compromise of production environments.
This vulnerability aligns with CWE-269, which describes Improper Privilege Control, as well as CWE-862, Missing Authorization, where a user is able to access resources or perform actions they are not explicitly allowed to do. In the context of the MITRE ATT&CK framework, this behavior corresponds to techniques such as T1078 Valid Accounts and specifically T1098 Account Manipulation if used to create new admin accounts, or more broadly under privilege escalation tactics where an attacker increases their level of access within a system. The exploitation path typically involves initial compromise followed by lateral movement through the abuse of legitimate administrative tools provided by the software itself.
Mitigation strategies must prioritize immediate patching and rigorous identity management practices. Organizations running affected versions should apply vendor-provided updates that address these authorization checks as soon as possible. In addition to patching, it is advisable to review role-based access control configurations to ensure that System Manager roles are strictly limited to their intended scope without overlapping with core administrative privileges. Implementing multi-factor authentication for all administrative accounts and monitoring logs for unusual privilege escalation attempts can provide additional layers of defense. Regular audits of user permissions and adherence to the principle of least privilege will help prevent similar vulnerabilities from being exploited in the future, ensuring that even if an account is compromised, the blast radius remains contained within appropriate boundaries.