CVE-2023-28104: Silverstripe Graphql

High severity, CVSS 7.5. EPSS: 1.1% chance of exploitation in the next 30 days.

`silverstripe/graphql` serves Silverstripe data as GraphQL representations. In versions 4.2.2 and 4.1.1, an attacker could use a specially crafted graphql query to execute a denial of service attack against a website which has a publicly exposed graphql endpoint. This mostly affects websites with particularly large/complex graphql schemas. Users should upgrade to `silverstripe/graphql` 4.2.3 or 4.1.2 to remedy the vulnerability.

Affected products

• Silverstripe Graphql: version 4.1.1 only; version 4.2.2 only

Published 2023-03-16. Last modified 2026-06-17.