CVE-2026-34451
Claude SDK for TypeScript: Memory Tool Path Validation Allows Sandbox Escape to Sibling Directories
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
13th
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.
| CWE | CWE-22 CWE-41 |
| Vendor | anthropics |
| Product | anthropic-sdk-typescript |
| Published | Mar 31, 2026 |
| Last Updated | Apr 1, 2026 |
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Affected Versions
anthropics / anthropic-sdk-typescript
>= 0.79.0, < 0.81.0
References
github.com: https://github.com/anthropics/anthropic-sdk-typescript/security/advisories/GHSA-5474-4w2j-mq4c github.com: https://github.com/anthropics/anthropic-sdk-typescript/commit/0ac69b3438ee9c96b21a7d3c39c07b7cdb6995d9 github.com: https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.81.0