GraphQL Asset Mutation Privilege Escalation Severity: High CVE ID: CVE-2026-25497 Key Information Package (Composer) Affected Versions Patched Versions Description There is a Privilege Escalation vulnerability in Craft CMS's GraphQL API that allows an authenticated user with write access to one asset volume to escalate their privileges and modify/transfer assets belonging to any other volume, including restricted or private volumes to which they should not have access. Summary Type: Privilege Escalation (CWE-269) Affected: Craft CMS 5.x (likely affects 4.x and 3.x as well) Location: lines 57-107 Root Cause The GraphQL mutation validates authorization against the schema-resolved volume but fetches the target asset by ID without verifying that the asset belongs to the authorized volume. This allows unauthorized cross-volume asset modification and transfer. Impact Transfer confidential assets from private volumes to public volumes (data exfiltration) Modify asset metadata in restricted volumes Bypass multi-tenant isolation in shared hosting environments References ac7edf8