Claude Agent SDK: Argument Injection via resume Option Allows Arbitrary Command Execution

Date Oct 16, 2026

Type Vendor advisory

Signal Critical vendor advisory

Vendor / Product PyPI · claude-agent-sdk

CVE CVE-2026-96620

Critical vendor advisory CVE-2026-96620

Summary

Claude Agent SDK: Argument Injection via resume Option Allows Arbitrary Command Execution

Why it matters

GitHub has published a reviewed security advisory for claude-agent-sdk. Prioritize it with other application dependency updates.

Operator check

Check whether claude-agent-sdk is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.2.

Sources

GitHub Advisory GHSA-h4mw-j7qp-8mwm NVD — CVE-2026-96620 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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