CVE-2026-34451

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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/anthropics/anthropic-sdk-typescript/commit/0ac69b3438ee9c96b21a7d3c39c07b7cdb6995d9	Patch
https://github.com/anthropics/anthropic-sdk-typescript/releases/tag/sdk-v0.81.0	Release Notes
https://github.com/anthropics/anthropic-sdk-typescript/security/advisories/GHSA-5474-4w2j-mq4c	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:anthropic:claude_sdk_for_typescript:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-31 22:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-34451

Mitre link : CVE-2026-34451

CVE.ORG link : CVE-2026-34451

JSON object : View

Products Affected

anthropic

claude_sdk_for_typescript

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-41

Improper Resolution of Path Equivalence

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Un modelo dirigido por inyecci\u00f3n de prompt podr\u00eda proporcionar una ruta manipulada que se resolv\u00eda en un directorio hermano que compart\u00eda el nombre de la ra\u00edz de la memoria como prefijo, permitiendo lecturas y escrituras fuera del directorio de memoria en sandbox. Este problema ha sido parcheado en la versi\u00f3n 0.81.0."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:anthropic:claude_sdk_for_typescript:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "517CE0BE-5A13-4B8B-BF90-6CC68C35D625", "versionEndExcluding": "0.81.0", "versionStartIncluding": "0.79.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}