CVE-2026-34451 | BDVDB-2026-323985 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-03-31Record published in the CVE List.
2. Version 22026-04-01Most recent update recorded in the CVE List.