Snowflake GitHub Actions Workflow Flaw Enabled Command Injection and Jira Token Theft
A vulnerability in Snowflake's GitHub Actions workflow in the snowflakedb/snowflake-connector-net repository allowed any user to execute arbitrary commands on a runner by creating a specially crafted issue in a public repository. The flaw stemmed from unsanitized insertion of issue titles and content directly into shell commands, combined with a failed access control check that relied on a non-existent pull request property during issue events. During authorized testing, an autonomous security agent exploited the issue to extract a Jira API token from the pipeline environment variables. This credential granted read access to internal engineering, security compliance, and bug bounty projects. The vulnerability was active from June 18 to June 23, 2026. Snowflake patched the workflow on the day the report was received and rotated the compromised token the following day. The vulnerable code appeared in a pull request that involved GitHub Copilot, though available history does not confirm the AI generated the insecure lines.
BoletimSecAug 19, 2026Translated from Portuguese