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 local filesystem memory tool in the Anthropic Python SDK created memory files with mode 0o666, leaving them world-readable on systems with a standard umask and world-writable in environments with a permissive umask such as many Docker base images. A local attacker on a shared host could read persisted agent state, and in containerized deployments could modify memory files to influence subsequent model behavior. Both the synchronous and asynchronous memory tool implementations were 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 local filesystem memory tool in the Anthropic Python SDK created memory
    files with mode 0o666, leaving them world-readable on systems with a standard umask and world-writable in
    environments with a permissive umask such as many Docker base images. A local attacker on a shared host
    could read persisted agent state, and in containerized deployments could modify memory files to influence
    subsequent model behavior. Both the synchronous and asynchronous memory tool implementations were
    affected. This issue has been patched in version 0.87.0. (CVE-2026-34450)

ID	Name	Product	Family	Type	Severity
463146	Echo: anthropic: security update to 0.87.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
463146	Echo: anthropic: security update to 0.87.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
439669	SCA: security update for anthropic (GHSA-q5f5-3gjm-7mfm)	Tenable Cloud Security	SCA Checks	Local	medium
439669	SCA: security update for anthropic (GHSA-q5f5-3gjm-7mfm)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-34450

medium

Tenable Plugins

medium

medium

medium

medium