CVE-2026-41686

The record

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.

Affected packages

Related vulnerabilities

• GHSA-p7fg-763f-g4gf Claude SDK for TypeScript has Insecure Default File Permissions in Local Filesystem… Same vulnerability
• GHSA-5474-4w2j-mq4c Claude SDK for TypeScript: Memory Tool Path Validation Allows Sandbox Escape to Sibling… Also affects @anthropic-ai/sdk
• CVE-2026-34451 Claude SDK for TypeScript provides access to the Claude API from server-side TypeScript… Also affects @anthropic-ai/sdk
• CVE-2026-102282 adm-zip is a JavaScript library for creating and extracting ZIP archives in Node.js. CWE-732
• CVE-2026-92941 vm2 versions from 3.11.3 before 3.11.7 expose the host tls module to NodeVM sandbox code… CWE-732
• CVE-2026-87988 An arbitrary file access vulnerability in Mistral Vibe allows an attacker to bypass… CWE-732
• CVE-2026-19583 Velociraptor allows some sensitive artifacts to be gated by additional permissions. CWE-732
• CVE-2026-79617 Incorrect Permission Assignment for Critical Resource vulnerability in TÜBİTAK BİLGEM… CWE-732