🔒Snowflake's GitHub Actions Vulnerability Exposed
Unauthenticated users could execute commands via a GitHub workflow
TL;DR
A critical vulnerability was found in Snowflake's public GitHub repository, allowing unauthenticated users to run arbitrary commands. The flaw was introduced on June 18, 2026, and fixed on June 23.
Snowflake identified a critical GitHub Actions workflow vulnerability in one of its repositories, enabling any user to execute arbitrary commands within the runner. This happened due to a commit that removed sanitized input patterns and replaced them with direct string expansion. The issue was introduced through PR #1218 on June 18, 2026, and exposed until Snowflake remediated it on June 23. If you manage GitHub Actions workflows or use Snowflake services, this is a red flag for your security practices.
Key Points
Vulnerability discovered in Snowflake's public GitHub repository on June 18, 2026 (PR #1218).
Unsanitized input patterns replaced with direct string expansion, enabling command execution via a single quote injection.
Issue was triggered by opening an issue in the repo, allowing any user to exploit it without authentication.
Snowflake remediated the vulnerability on June 23, 2026, rotating affected credentials and verifying no data leakage occurred.
Wiz security firm confirmed sole actor during exposure window; all test data securely deleted post-proof-of-concept.
Why It Matters
If you manage GitHub Actions workflows or use Snowflake services, this vulnerability highlights the critical need for thorough input sanitization. The flaw allowed unauthenticated users to execute arbitrary commands, impacting any team relying on these workflows.
Frequently Asked Questions
Why does this matter?
If you manage GitHub Actions workflows or use Snowflake services, this vulnerability highlights the critical need for thorough input sanitization. The flaw allowed unauthenticated users to execute arbitrary commands, impacting any team relying on these workflows.
What happened?
A critical vulnerability was found in Snowflake's public GitHub repository, allowing unauthenticated users to run arbitrary commands. The flaw was introduced on June 18, 2026, and fixed on June 23.
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