What’s Vulnerable › Vulnerabilities
CVE-2026-11431: Path Traversal in Altium Projects Service Allows Arbitrary File Read
- Severity: high (CVSS 8.3 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-05 · updated 2026-07-23
- Weakness: CWE-22
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.
Affected products
- Altium 365: all versions
- Altium Enterprise Server: before 8.1.1 — fixed in 8.1.1
How to fix
Upgrade to a fixed version: Altium Enterprise Server 8.1.1. Check the vendor advisory for mitigations.
References
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