A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem. Because the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint. On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.
History

Mon, 08 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 07 Jun 2026 11:30:00 +0000

Type Values Removed Values Added
First Time appeared Altium
Altium altium 365
Altium enterprise Server
Vendors & Products Altium
Altium altium 365
Altium enterprise Server

Fri, 05 Jun 2026 21:30:00 +0000

Type Values Removed Values Added
Description A path traversal vulnerability exists in the Projects Service download endpoint shared by Altium Enterprise Server and Altium 365. An authenticated user can supply a crafted path parameter that bypasses validation, allowing arbitrary files (including entire directories returned as archives) to be read from the server filesystem. Because the readable files include service configuration and credential material, exploitation can be used to gather information enabling further compromise. The issue can be combined with CVE-2026-11424 to reach the cloud-side endpoint. On multi-tenant Altium 365 deployments, the readable configuration could have exposed credentials shared across services. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level.
Title Path Traversal in Altium Projects Service Allows Arbitrary File Read
Weaknesses CWE-200
CWE-22
References
Metrics cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Altium

Published: 2026-06-05T21:08:05.532Z

Updated: 2026-06-08T13:12:33.194Z

Reserved: 2026-06-05T21:03:16.924Z

Link: CVE-2026-11431

cve-icon Vulnrichment

Updated: 2026-06-08T13:12:29.659Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-06-05T22:16:47.650

Modified: 2026-06-08T15:00:38.710

Link: CVE-2026-11431

cve-icon Redhat

No data.