| Package | Affected versions | Patched versions |
|---|---|---|
| tinacms/graphql | ≤ 2.2.1 | |
| @tinacms/graphql | < 2.2.2 | 2.2.2 |
A Path Traversal vulnerability in @tinacms/graphql allows unauthenticated users to write and overwrite arbitrary files within the project root. This is achieved by manipulating the relativePath parameter in GraphQL mutations. The impact includes the ability to replace critical server configuration files and potentially execute arbitrary commands by sabotaging build scripts.
The vulnerability exists in the path validation logic within @tinacms/graphql. Specifically, the regex-based validation in getValidatedPath fails to recognize backslashes (\) as directory separators on non-Windows platforms (Mac/Linux). An attacker can provide a path like x\..\..\..\package.json, which bypasses the validation check but is subsequently treated as a traversal path during file I/O operations by the underlying fs modules and path normalization utilities.
Incriminated code areas:
getValidatedPath function.curl -X POST http://localhost:4001/graphql \
-H "Content-Type: application/json" \
-d '{"query": "mutation { updateDocument(collection: \"global\", relativePath: \"x\\\\..\\\\..\\\\..\\\\package.json\", params: { global: { header: { name: \"OVERWRITTEN\" } } }) { __typename } }"}'
This is an Arbitrary File Write vulnerability. Any unauthenticated user with network access to the GraphQL API can:
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