CVE-2026-34450 in Anthropic anthropic-sdk-pythoninfo

Summary

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.

Responsible

GitHub_M

Reservation

03/27/2026

Disclosure

04/01/2026

Entries

VulDB provides additional information and datapoints for this CVE:

IDVulnerabilityCWEExpCouCVE
354557Anthropic anthropic-sdk-python Claude API default permission276Not definedOfficial fixCVE-2026-34450

Description

CPE

CWE

CVSS

Exploits

History

Diff

Relate

Threat Intelligence

API JSON

API XML

API CSV

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!