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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-34452)

ID	Name	Product	Family	Type	Severity
463189	Echo: anthropic: security update to 0.87.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
463189	Echo: anthropic: security update to 0.87.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
439664	SCA: security update for anthropic (GHSA-w828-4qhx-vxx3)	Tenable Cloud Security	SCA Checks	Local	medium
439664	SCA: security update for anthropic (GHSA-w828-4qhx-vxx3)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-34452

medium

Tenable Plugins

medium

medium

medium

medium