GHSA-F4XH-W4CJ-QXQ8 LangSmith SDK TracingMiddleware: Arbitrary server-side file read

Summary An attacker who can send an HTTP request to a server running the LangSmith SDK's TracingMiddleware can cause that server to read an arbitrary file from its local filesystem and upload the contents to LangSmith as a trace attachment. Depending on how the distributed trace system is deploye...