Industry - Data Breach
Executive Summary
Grafana suffered a data breach after hackers used a GitHub workflow token that was not rotated following the TanStack npm supply-chain attack, allowing unauthorized access to private repositories. The attackers stole source code and business contact information, including names and email addresses used in professional relationships, but Grafana states no customer production data or systems were compromised. The breach occurred despite an initial incident response that rotated most tokens, wit...
What Happened
Grafana suffered a data breach in May 2026 when hackers exploited a GitHub workflow token that was not rotated after the company's systems were compromised through malicious TanStack npm packages. The attackers used this overlooked token to access Grafana's private GitHub repositories, stealing source code and business contact information including names and email addresses used in professional relationships. Grafana detected the initial compromise on May 1 and rotated most tokens, but one specific GitHub workflow token was missed, enabling the unauthorized access.
Who Is Affected
Business contacts whose names and email addresses are used by Grafana in professional relationships have been exposed in this breach. Grafana states that no customer production data or information from the Grafana Cloud platform was compromised, and no customer production systems were accessed. Developers and users of Grafana's codebase are not affected, as the company confirmed the code was not modified during the incident.
Why It Matters
This breach demonstrates how supply-chain attacks can have cascading effects even after initial incident response, highlighting the critical importance of comprehensive token rotation procedures. The incident shows that incomplete security remediation can leave organizations vulnerable to follow-on attacks, even when they detect and respond to initial compromises. The breach is part of the broader Shai-Hulud malware campaign that has affected dozens of packages, illustrating systemic risks in software development supply chains.
What You Should Do
If you are a Grafana business contact, monitor your email for potential phishing attempts using the stolen contact information. Grafana users and developers do not need to take action regarding downloaded code, as it has been confirmed safe and unmodified. Stay alert for direct notifications from Grafana Labs if the company discovers additional impacts during its ongoing investigation.
Summary generated from verified sources and reviewed before publication. How we summarize.