CVE-2026-96620: claude-agent-sdk-python < 0.2.121

Affected technology

claude-agent-sdk-python · < 0.2.121
anthropics

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can inject the --mcp-config flag to define a stdio MCP server, causing arbitrary command execution at CLI startup outside the SDK permission controls. Vendor/CNA’s CVSS 4.0 assessment (base score 9.2/10) rates confidentiality, integrity and availability impact as high.

Published 16-Oct-2026 20:21 UTC

CWE: CWE-20, CWE-78, CWE-88
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-16 20:20:42.059737+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-96620.html