AI Security Agent Exploits Copilot-Introduced Flaw to Steal Snowflake Credentials

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On June 18, 2026, GitHub Copilot Autofix introduced a code change to a Snowflake connector repository that inadvertently removed input sanitization from a GitHub Actions workflow, creating a shell script injection vulnerability. Five days later, on June 23, an autonomous offensive security agent developed by Wiz discovered the flaw during a routine scan. The agent exploited the vulnerability by crafting a malicious GitHub issue title that triggered arbitrary command execution inside Snowflake's GitHub Actions runner without any human involvement. It then exfiltrated Jira credentials, gaining read access to internal engineering, security compliance, and bug bounty tracking projects. A patch was deployed within hours of detection, but the credentials were exposed during the intervening window, highlighting the risks of deploying AI-generated code without rigorous review.

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