Grafana Labs, a prominent provider of open-source visualization software, confirmed a cybersecurity incident on May 19, 2026. The company stated that its investigation into the breach, which impacted its GitHub environment, found no evidence that customer production systems or operations were compromised. The incident is understood to be limited to Grafana Labs’ source code repositories and internal operational information stored on GitHub.
Grafana Labs Confirms GitHub Environment Breach
In a statement released on May 19, 2026, Grafana Labs detailed the scope of a recent cybersecurity incident. The investigation revealed that the breach primarily affected the company’s GitHub environment, encompassing both public and private source code repositories, as well as internal repositories used for team collaboration and storing business operational data. The company emphasized that no data was accessed from its production systems or the Grafana Cloud platform.
According to Grafana Labs, the compromised data included business contact names and email addresses that are typically exchanged within professional contexts. The company was clear that this information was not extracted from or processed through its core production systems. This distinction is crucial for understanding the potential impact on its customers, who rely on Grafana’s services for their own operations.
The root cause of the breach has been identified as a sophisticated supply chain attack. Grafana Labs reported that the incident originated from the TanStack npm supply chain attack, orchestrated by a threat actor group known as TeamPCP. This same group has been linked to prior attacks targeting major technology firms, including OpenAI and Mistral AI.
Understanding the Supply Chain Attack Vector
The company explained that it initially detected the suspicious activity on May 11, 2026. Following an initial assessment, Grafana Labs took immediate steps to rotate a significant number of GitHub workflow tokens. However, a token that was inadvertently overlooked allowed the attackers to gain access to the company’s GitHub repositories. A subsequent review confirmed that a specific GitHub workflow, initially believed to be unaffected, had in fact been compromised.
Following the discovery of the unauthorized access, Grafana Labs received an extortion demand from an unnamed threat actor on May 16, 2026. The company stated its decision not to pay the ransom. Grafana Labs cited concerns that paying would offer no guarantee of data deletion and could potentially encourage future malicious campaigns targeting the company or its partners.
In response to the incident, Grafana Labs has implemented a series of security enhancements. These measures include rotating all automation tokens, establishing enhanced monitoring protocols for its GitHub environment, conducting thorough audits of all code commits for any signs of malicious activity, and strengthening its overall GitHub security posture. These actions are aimed at preventing similar incidents in the future and reinforcing the integrity of its development infrastructure.
It is noteworthy that a data extortion group, identified as CoinbaseCartel, listed Grafana Labs on its dark web site on May 15, 2026. This listing predates Grafana Labs’ public disclosure of the breach. The Hacker News had reached out to Grafana Labs for comment prior to their announcement, and confirmed the company’s stance on the incident.
This development occurs concurrently with GitHub’s own ongoing investigation into unauthorized access to its internal repositories. The notorious threat actor group, TeamPCP, has also been implicated in this broader issue, having reportedly offered GitHub’s source code and internal organization details for sale on a cybercrime forum. The interconnected nature of these incidents highlights the increasing sophistication and reach of supply chain attacks in the cloud security landscape.
Moving forward, Grafana Labs will continue to monitor its systems closely and work with cybersecurity experts to further bolster its defenses. The company’s commitment to transparency suggests further updates may be provided as its investigation and remediation efforts progress. The broader implications for cloud security and the prevalence of supply chain attacks remain a critical area of concern for the technology sector.