EUVD-2026-27087

Claude SDK for TypeScript provides access to the Claude API from server-side TypeScript or JavaScript applications. From version 0.79.0 to before version 0.91.1, the BetaLocalFilesystemMemoryTool in the Anthropic TypeScript SDK created memory files and directories using the Node.js default modes...

Incorrect Permission Assignment for Critical Resource

Overview @anthropic-ai/sdk is a The official TypeScript library for the Anthropic API Affected versions of this package are vulnerable to Incorrect Permission Assignment for Critical Resource in the BetaLocalFilesystemMemoryTool that creates memory files and directories using the Node.js default...

Claude SDK for TypeScript has Insecure Default File Permissions in Local Filesystem Memory Tool

The BetaLocalFilesystemMemoryTool in the Anthropic TypeScript SDK created memory files and directories using the Node.js default modes 0o666 for files, 0o777 for directories, leaving them world-readable on systems with a standard umask and world-writable in environments with a permissive umask su...