CVE-2025-27097: Cache variables with the operations when transforms exist on the root level even if variables change in the further requests with the same operation

Vulnerability summary

CVE-2025-27097 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in ardatan graphql-mesh. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.5% of scored vulnerabilities.

Timeline

1. 20-02-2025
   PublishedVulnerability first disclosed.
2. 20-02-2025
   Last modifiedVulnerability information updated.

Description

GraphQL Mesh is a GraphQL Federation framework and gateway for both GraphQL Federation and non-GraphQL Federation subgraphs, non-GraphQL services, such as REST and gRPC, and also databases such as MongoDB, MySQL, and PostgreSQL. When a user transforms on the root level or single source with transforms, and the client sends the same query with different variables, the initial variables are used in all following requests until the cache evicts DocumentNode. If a token is sent via variables, the following requests will act like the same token is sent even if the following requests have different tokens. This can cause a short memory leak but it won't grow per each request but per different operation until the cache evicts DocumentNode by LRU mechanism.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
• CWE-401Missing Release of Memory after Effective LifetimeThe product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.