CVE-2026-102478
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation. It was possible for the built-in role to be weakened and the attacker's account added to a privileged team. This was achievable due to improper validation of unsafe equivalence in inputs.
Risk Assessment
An attacker with role-editing permission can gain higher privileges and add their account to a privileged team, taking control of critical functions. This poses a serious privilege escalation risk in the environment.
Recommendation
Update Octopus Server to a version containing the input validation fix. Review role definitions and team memberships for unauthorized changes.
Other vulnerabilities in Octopus Server
See all- CVE-2026-78210High
In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts in an environment without possessing the required authorization.
- CVE-2026-102488High
Octopus Server incorrectly evaluates multiple scoped permission assignments, allowing a highly privileged user to obtain deployment permissions beyond those actually granted. This affects versions with the flawed permission evaluation logic.
- CVE-2026-101169High
In affected versions of Octopus Server, an authenticated user with permissions to edit an Environment or Project can set specifically crafted JSON content. Insecure deserialization of this content allows arbitrary code execution in the Octopus Server process.
- CVE-2026-92355High
In affected versions of Octopus Server, a user with permission to modify non built-in external feeds could exploit a path traversal flaw to overwrite arbitrary files on the server, potentially leading to remote code execution in some configurations.
- CVE-2026-91778High
In affected versions of Octopus Server, users with certain scoped permission sets could execute arbitrary scripts on a worker, including the built-in worker. Incorrect permission validation during script execution allowed the script to run without the user having the required authorization.
- CVE-2026-14163High
In affected versions of Octopus Server, sensitive variables may be printed in clear-text in the deployment variable snapshot under certain circumstances.
- CVE-2026-8296Medium
In affected versions of Octopus Server with certain access levels it was possible to embed a Cross-Site Scripting Payload via artifacts.
- CVE-2026-4881Medium
In affected versions of Octopus Server, permissions were not checked correctly resulting in any authenticated user being able to make server level changes using a certain API endpoint despite receiving an error.
Original NVD description (English source)
In affected versions of Octopus Server, an authenticated user with permission to modify roles could bypass the protections preventing access abuse resulting in privilege escalation. It was possible for the built-in role to be weakened and the attacker's account added to a privileged team. This was achievable due to improper validation of unsafe equivalence in inputs.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS