CVE-2026-34451

N/A

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.

CVE Details

CVSS v3.1 ScoreN/A

Published3/31/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-22CWE-41

References

https://github.com/anthropics/anthropic-sdk-typescript/commit/0ac69b3438ee9c96b21a7d3c39c07b7cdb6995d9(security-advisories@github.com)

https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.81.0(security-advisories@github.com)

https://github.com/anthropics/anthropic-sdk-typescript/security/advisories/GHSA-5474-4w2j-mq4c(security-advisories@github.com)

IOC Correlations

No correlations recorded

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