CVE-2026-6442: Snowflake Cortex Code CLI RCE Vulnerability

CVE-2026-6442 Overview

Improper validation of bash commands in Snowflake Cortex Code CLI versions prior to 1.0.25 allowed subsequent commands to execute outside the sandbox. An attacker could exploit this by embedding specially crafted commands in untrusted content, such as a malicious repository, causing the CLI agent to execute arbitrary code on the local device without user consent. This vulnerability is classified under CWE-1286 (Improper Validation of Syntactic Correctness of Input).

Critical Impact

This command injection vulnerability enables arbitrary code execution on systems running vulnerable versions of Snowflake Cortex Code CLI. Exploitation is non-deterministic and model-dependent, meaning the success of attacks may vary based on the AI model's interpretation of malicious input.

Affected Products

• Snowflake Cortex Code CLI versions prior to 1.0.25

Discovery Timeline

• 2026-04-16 - CVE CVE-2026-6442 published to NVD
• 2026-04-16 - Last updated in NVD database

Technical Details for CVE-2026-6442

Vulnerability Analysis

This vulnerability exists in the Snowflake Cortex Code CLI, an AI-powered command-line interface tool. The core issue stems from improper validation of bash commands before execution, which allows attackers to break out of the intended sandbox environment. The vulnerability is particularly concerning because it can be triggered through interaction with malicious content, such as a compromised or malicious code repository.

The attack vector is network-based, requiring user interaction (such as cloning or processing a malicious repository). The scope is changed, meaning successful exploitation can affect resources beyond the vulnerable component's security scope. This vulnerability can result in complete compromise of confidentiality, integrity, and availability on the affected local device.

Root Cause

The root cause is improper validation of syntactic correctness of input (CWE-1286). The Cortex Code CLI agent failed to properly sanitize and validate bash commands before execution, allowing specially crafted input to inject additional commands that execute outside the intended sandbox constraints. This is a classic command injection pattern where the boundary between data and executable commands is not properly enforced.

Attack Vector

An attacker exploits this vulnerability by embedding malicious commands within content that the Cortex Code CLI processes. The attack flow typically involves:

1. The attacker creates a malicious repository containing specially crafted content with embedded shell commands
2. A victim user interacts with this repository using the vulnerable Cortex Code CLI
3. The CLI agent processes the malicious content and fails to properly sanitize embedded commands
4. The injected commands execute outside the sandbox with the user's privileges, without consent or notification

The exploitation is described as non-deterministic and model-dependent, indicating that the AI model's interpretation of the malicious input affects whether the injection succeeds. This adds an element of unpredictability to both attacks and detection.

Detection Methods for CVE-2026-6442

Indicators of Compromise

• Unexpected process spawning from Cortex Code CLI parent processes
• Unusual network connections or file system modifications initiated by the CLI agent
• Shell command execution patterns that deviate from normal CLI operations
• Evidence of repository cloning followed by anomalous system activity

Detection Strategies

• Monitor for child processes spawned by Cortex Code CLI that include bash, sh, or other shell interpreters executing unexpected commands
• Implement application allowlisting to detect when the CLI attempts to execute non-standard binaries
• Deploy endpoint detection rules to identify command injection patterns in process command lines
• Review system logs for evidence of sandbox escape attempts from AI agent processes

Monitoring Recommendations

• Enable detailed logging for Cortex Code CLI operations and command execution
• Implement behavioral monitoring for AI-powered CLI tools to establish baseline activity
• Alert on any commands executed outside expected CLI sandbox boundaries
• Monitor for connections to unknown repositories that may contain malicious payloads

How to Mitigate CVE-2026-6442

Immediate Actions Required

• Verify that Snowflake Cortex Code CLI has been updated to version 1.0.25 or later
• Audit recent CLI activity for signs of unauthorized command execution
• Review any repositories recently processed by the CLI for potentially malicious content
• Temporarily restrict CLI usage to trusted, verified repositories until updates are confirmed

Patch Information

The fix is automatically applied upon relaunch of the Snowflake Cortex Code CLI with no user action required. Users should ensure they restart the application to receive the automatic update. The patched version 1.0.25 addresses the improper command validation issue that allowed sandbox escape. For additional details, see the Snowflake PromptArmor Report.

Workarounds

• Avoid processing untrusted or unverified repositories until the CLI is updated
• Run the Cortex Code CLI in isolated environments with restricted permissions where possible
• Implement network segmentation to limit the impact of potential code execution
• Use allowlisting to control which external repositories the CLI can access