CVE-2026-14163 in Octopus Server
Summary
by MITRE • 08/20/2026
In affected versions of Octopus Server under certain circumstances it is possible for sensitive variables to be printed in the deployment variable snapshot in clear-text.
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Analysis
by VulDB Data Team • 08/21/2026
The vulnerability identified within specific versions of Octopus Server represents a significant information disclosure flaw that compromises the confidentiality of sensitive configuration data. This issue arises from an improper handling of variable masking during the generation of deployment snapshots, which are historical records used for auditing and troubleshooting purposes in continuous delivery pipelines. Under certain operational circumstances, variables explicitly marked as secure or masked to prevent their values from being displayed in logs and user interfaces fail to undergo adequate sanitization before being persisted into these snapshot structures. Consequently, when a deployment is recorded, the plaintext value of sensitive information such as database passwords, API keys, or encryption certificates is inadvertently written to the storage backend rather than remaining obscured or encrypted.
From a technical perspective, this flaw stems from a logic error in the serialization process where the system fails to distinguish between display-time masking and storage-time protection. While the user interface correctly hides these values to prevent accidental exposure on screens, the underlying data model does not apply equivalent safeguards when archiving deployment history. This discrepancy allows an attacker with access to historical deployment records or audit logs to retrieve cleartext credentials that were intended to be kept secret. The vulnerability is particularly dangerous because it bypasses standard security controls designed to protect secrets in transit and at rest, relying instead on superficial UI-level obfuscation which does not extend to the data persistence layer.
The operational impact of this vulnerability is severe for organizations utilizing Octopus Server as part of their DevSecOps infrastructure. If an attacker gains read access to deployment history or backup files containing these snapshots, they can extract high-value credentials that may provide unauthorized access to production databases, cloud services, or internal microservices. This exposure facilitates lateral movement within the network and increases the risk of data breaches, service disruption, and compliance violations related to standards such as PCI DSS or GDPR which mandate strict protection of sensitive personal and financial data. The persistence of these cleartext secrets in historical records means that even if credentials are rotated after a deployment, previous snapshots may still contain compromised material unless all affected history is purged or re-encrypted.
To mitigate this risk, administrators should immediately upgrade to the patched version of Octopus Server where the serialization logic has been corrected to ensure sensitive variables remain masked during snapshot creation. In addition to upgrading, it is critical to rotate any credentials that were exposed in deployment snapshots prior to applying the fix, as previous records may already contain cleartext values. Organizations should also review their access controls for deployment history and audit logs to limit visibility of these artifacts to only authorized personnel with a legitimate need to know. Implementing strict least-privilege principles ensures that even if such data is exposed, it remains inaccessible to unauthorized users or external attackers who might exploit other vulnerabilities in the environment.
This vulnerability aligns with CWE-200 Information Exposure and CWE-319 Cleartext Transmission of Sensitive Information within a persistent storage context, reflecting failures in proper handling of sensitive data during archival processes. It also relates to ATT&CK technique T1530 Data from Cloud Storage Object as attackers could potentially exfiltrate these snapshots if they gain access to the underlying object store or database where Octopus Server persists its deployment history. By addressing this flaw and enforcing rigorous secret management practices, organizations can significantly reduce their attack surface and maintain the integrity of their security posture in automated deployment environments.