CVE-2026-11424

Vulnerability

A server-side request forgery (SSRF) vulnerability exists in a GraphQL service component shared by Altium Enterprise Server and Altium 365. An authenticated user can submit a request whose input is treated as a URL by the server and used to issue an outbound HTTP GET request without URL validation or destination filtering. The response body is then returned to the user. Altium Enterprise Server is fixed in 8.1.1; the issue has been remediated in Altium 365 at the service level [1].

Exploitation

An authenticated attacker needs network access to the vulnerable service. The attacker submits a crafted request to the GraphQL service, providing input that is interpreted as a URL. The server then issues an outbound HTTP GET request to this URL without performing validation or filtering on the destination. The response from the internal service is then returned to the attacker [1].

Impact

Successful exploitation allows an authenticated attacker to reach internal services and metadata endpoints that are not normally accessible from the public network. This enables information disclosure and internal infrastructure reconnaissance. The request primitive is limited to HTTP GET with no custom headers, and the response body is returned to the attacker [1].

Mitigation

Altium Enterprise Server is fixed in version 8.1.1. The issue has been remediated in Altium 365 at the service level, meaning no customer action is required for Altium 365 cloud deployments [1].