CVE-2026-9102: Path Traversal in Altium Enterprise Server ComparisonService Allows Arbitrary File Write
A path traversal vulnerability exists in the Altium Enterprise Server ComparisonService due to missing filename sanitization in the Gerber file upload APIs. A regular authenticated workspace user can supply a crafted filename in the multipart Content-Disposition header to escape the intended temporary upload directory and write arbitrary files to any location on the server filesystem.
Because content-controlled files can be written to web-accessible directories, this can be escalated to remote code execution in the context of the service account. It can also be used to overwrite application binaries or configuration files, leading to service takeover or denial of service.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-9102?
CVE-2026-9102 has a critical severity rating of 9.4 based on CVSS v4.0.
How do I fix CVE-2026-9102?
To fix CVE-2026-9102, update to the latest version of Altium Enterprise Server that includes the patch addressing the path traversal vulnerability.
What kind of vulnerability is CVE-2026-9102?
CVE-2026-9102 is a path traversal vulnerability that allows arbitrary file write due to inadequate filename sanitization.
Who is affected by CVE-2026-9102?
CVE-2026-9102 affects regular authenticated users of the Altium Enterprise Server ComparisonService who can exploit the vulnerability.
What can an attacker achieve with CVE-2026-9102?
An attacker exploiting CVE-2026-9102 can use crafted filenames to write arbitrary files on the server, potentially leading to further compromises.