CVE-2026-34451 — UNKNOWN AI Security Vulnerability

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...

Full CISO analysis pending enrichment.

Severity & Risk

CVSS 3.1

N/A

EPSS

N/A

KEV Status

Not in KEV

Sophistication

N/A

Recommended Action

No patch available

Monitor for updates. Consider compensating controls or temporary mitigations.

Compliance Impact

Compliance analysis pending. Sign in for full compliance mapping when available.

Technical Details

NVD 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.

Weaknesses (CWE)

CWE-22 Primary CWE-41 Primary

References

Timeline

Published

March 31, 2026

Last Modified

March 31, 2026

First Seen

March 31, 2026