Claude SDK for Python: Memory Tool Path Validation Race Condition Allows Sandbox Escape

TRUNG BÌNH 5.3CVE-2026-34452 · GHSA-w828-4qhx-vxx3 · PYSEC-2026-2115 · Công bố 31/03/2026 · cập nhật 24/07/2026

Tóm tắt nhanh

CVE-2026-34452 là lỗ hổng mức TRUNG BÌNH (CVSS 5.3) ảnh hưởng anthropic, claude sdk for python (anthropic).
Xác suất bị khai thác trong 30 ngày tới (EPSS): 0.14%, cao hơn 3.6% các lỗ hổng khác.
Cách xử lý: cập nhật lên 0.87.0 hoặc mới hơn.

Gói / sản phẩm	Phiên bản bị ảnh hưởng	Phiên bản đã vá
anthropic PyPI	`≥ 0.86.0, < 0.87.0`	`0.87.0`
claude sdk for python anthropic	`≥ 0.86.0, < 0.87.0`	`0.87.0`

Mô tả

The async local filesystem memory tool in the Anthropic Python SDK validated that model-supplied paths resolved inside the sandboxed memory directory, but then returned the unresolved path for subsequent file operations. A local attacker able to write to the memory directory could retarget a symlink between validation and use, causing reads or writes to escape the sandbox. The synchronous memory tool implementation was not affected.

Users on the affected versions are advised to update to the latest version.

Claude SDK for Python thanks hackerone.com/kasthelord for reporting this issue!

Mô tả của NVD

The Claude SDK for Python provides access to the Claude API from Python applications. From version 0.86.0 to before version 0.87.0, the async local filesystem memory tool in the Anthropic Python SDK validated that model-supplied paths resolved inside the sandboxed memory directory, but then returned the unresolved path for subsequent file operations. A local attacker able to write to the memory directory could retarget a symlink between validation and use, causing reads or writes to escape the sandbox. The synchronous memory tool implementation was not affected. This issue has been patched in version 0.87.0.