CVE-2026-96620criticalCWE-20CWE-78CWE-88

CVE-2026-96620: fallo crítico en anthropics claude-agent-sdk-python

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

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear claude-agent-sdk-python+ Monitorear claude-agent-sdk

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

28Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 9.2epss 0.7%
Claude Agent SDK is a Python SDK for Claude Code. Prior to 0.2.121, the resume option is passed to the Claude CLI as a separate token without validation, so a dash-leading value is parsed as an independent CLI flag. 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. The issue is exploitable when an application passes untrusted input as the session ID to resume. This issue is fixed in version 0.2.121.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Productos afectados
anthropics · claude-agent-sdk-python