CVE-2026-34450

The record

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.

Affected packages

Related vulnerabilities

• CVE-2026-11813 A potential improper permissions vulnerability was reported in the Lenovo Filez Client… CWE-276
• CVE-2026-52766 YesWiki is a wiki system written in PHP. CWE-276
• CVE-2026-77393 In Ignition 8.1.53 and earlier, the Gateway "Create Project Role(s)" setting shipped… CWE-276
• CVE-2026-75166 Insecure Permission vulnerability in MBS-Solutions X-Serie Gateway firmware V6_00_05… CWE-276
• CVE-2026-81302 PALLET CONTROL products contain an incorrect default permission vulnerability, which may… CWE-276
• CVE-2026-9634 A security issue exists within the Redundancy Module Configuration Tool. CWE-276
• CVE-2026-9633 A security issue exists within the Redundancy Module Configuration Tool. CWE-276
• CVE-2026-69665 SKYSEA Client View and SKYMEC IT Manager contain an issue with incorrect default… CWE-276