CVE-2026-9129
CWE-22Published: May 20, 2026· Updated: May 21, 2026
Official Description
A path traversal vulnerability exists in the Altium Enterprise Server Viewer StorageController due to improper handling of file path route parameters. On on-premise deployments that use local filesystem storage, a regular authenticated user can supply a URL-encoded absolute path (such as an encoded drive letter) in a Viewer storage API request, causing the configured storage root to be discarded and allowing arbitrary files to be read from the server filesystem.
Because the readable files include the server's master configuration, which stores database credentials, signing key locations, certificate passwords, and OAuth secrets, exploitation can lead to disclosure of all server secrets and full compromise of the server and its data. Cloud deployments are not affected, as they use object storage and do not enable this component.
Risk Analysis
This critical path traversal vulnerability in Altium Enterprise Server Viewer StorageController allows an authenticated user to read arbitrary files from the server filesystem. By supplying a crafted URL-encoded absolute path, an attacker can bypass the intended storage root. With a CVSSv4 score of 9.4, this can lead to the disclosure of all server secrets, including database credentials and OAuth secrets, resulting in full server compromise.
No public exploit is currently known for this vulnerability. The vulnerability is remotely exploitable by an authenticated user over the network with low attack complexity.
On-premise deployments of Altium Enterprise Server should apply any available patches to address the path traversal vulnerability. Implement strict input validation for file path parameters and ensure proper access controls are in place.
Technical Analysis
CVE-2026-9129 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploit & PoC Resources
All References (1)
Quick Facts
Related CVEs (CWE-22)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-9129 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts