CVE-2026-11429: Path Traversal in Altium Vault ScriptsController Allows Unauthenticated Remote Code Execution
Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file uploads where a user-supplied filename component is used to construct the destination path without validation, allowing arbitrary files to be written to any location writable by the service account. Because the file write operation completes before authentication is validated, the vulnerability can be exploited without any credentials, session, or prior knowledge of the system.
An unauthenticated network attacker can use this primitive to place executable content in directories where it is later executed by the service, resulting in remote code execution under the Vault Service account. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 (commercial and government cloud) at the service level.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Altium Enterprise Serverto a version that resolves this vulnerability.Fixed in 8.1.1 - Operational
Altium 365 (commercial and government cloud) has been remediated at the service level; no customer-side update is required.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-11429?
The severity of CVE-2026-11429 is critical with a CVSS score of 9.4.
How do I fix CVE-2026-11429?
To fix CVE-2026-11429, update your Altium Enterprise Server or Altium 365 to the latest patched version provided by Altium.
What is the impact of CVE-2026-11429?
CVE-2026-11429 allows for path traversal, which can lead to remote code execution by an authenticated user with basic git access.
Which software is affected by CVE-2026-11429?
CVE-2026-11429 affects Altium Enterprise Server and Altium 365.
How can I determine if my system is vulnerable to CVE-2026-11429?
You can determine if your system is vulnerable to CVE-2026-11429 by checking if you are using vulnerable versions of Altium Enterprise Server or Altium 365.