CVE-2026-41686
CVE-2026-41686 · Claude SDK for TypeScript has Insecure Default File Permissions in Local Filesystem Memory Tool
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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 (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 such as many Docker base images. A local attacker on a shared host could read persisted agent state, and in containerized deployments could modify memory files to influence subsequent model behavior. This issue has been patched in version 0.91.1.
CVSS 4.8 · Medium · EPSS 0.1% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
anthropic-sdk-typescript
- Versions
- >= 0.79.0, < 0.91.1: Affected
No fix published
@anthropic-ai/sdk npm
- Affected ranges
- SEMVER: ≥ 0.79.0, < 0.91.1
Update to 0.91.1