gcdRadar
archive/Patch now/AIR-2026-0333
closedclosed 16 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-96620: Claude Agent SDK Command Injection Vulnerability

Claude Agent SDK, Claude Code

A vulnerability in the Claude Agent SDK prior to version 0.2.121 allows arbitrary command execution when untrusted input is passed to the resume option, leading to MCP config injection. The issue has been patched in version 0.2.121.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
9.2
EPSS
0.01 · top 47% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
16 Oct 2026
last update
16 Oct 2026
CVE ids
CVE-2026-96620other records

Timeline · 1

  1. 16 Oct 2026CVE-2026-96620: Claude Agent SDK is a Python SDK for Claude Code.

Sources · 1

Advisories and databases

  1. 2026-10-16
    CVE-2026-96620: Claude Agent SDK is a Python SDK for Claude Code.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-96620

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerability
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Anthropic, Framework / tooling
owasp llm top 10
LLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
command-injectionmcp
dates
happened 16 Oct 2026 · first reported 16 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-96620: Claude Agent SDK Command Injection Vulnerability

https://gcdradar.vercel.app/incidents/cve-2026-96620-claude-agent-sdk-command-injection-vulnerabil · AIR-2026-0333 · closed 2026-10-16

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-16
- AI role: Attack on AI
- Products: Claude Agent SDK, Claude Code
- CVE ids: CVE-2026-96620
- CVSS: 9.2

## Summary

A vulnerability in the Claude Agent SDK prior to version 0.2.121 allows arbitrary command execution when untrusted input is passed to the resume option, leading to MCP config injection. The issue has been patched in version 0.2.121.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-16: CVE-2026-96620: Claude Agent SDK is a Python SDK for Claude Code. (https://nvd.nist.gov/vuln/detail/CVE-2026-96620)

## Sources

- 2026-10-16 NVD: CVE-2026-96620: Claude Agent SDK is a Python SDK for Claude Code. https://nvd.nist.gov/vuln/detail/CVE-2026-96620

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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