CVE-2026-34451
Published: Mar 31, 2026
Modified: Apr 1, 2026
Description
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 0.81.0, the local filesystem memory tool in the Anthropic TypeScript SDK validated model-supplied paths using a string prefix check that did not append a trailing path separator. A model steered by prompt injection could supply a crafted path that resolved to a sibling directory sharing the memory root's name as a prefix, allowing reads and writes outside the sandboxed memory directory. This issue has been patched in version 0.81.0.
| Vendor | Product | Versions |
|---|---|---|
anthropics | anthropic-sdk-typescript | affected >= 0.79.0, < 0.81.0 |
References
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