1. [News](/news) 2. Elementary Data data breach: supply chain attack compromises PyPI package # Elementary Data data breach: supply chain attack compromises PyPI package A data breach involving Elementary Data was reported in April 2026. See incident details, impact on customers, and recommended security measures. UpGuard Team April 29, 2026 Table of Contents * [What happened in the Elementary Data data breach?](#what-happened-in-the-elementary-data-data-breach) * [Who is behind the incident?](#who-is-behind-the-incident) * [Impact and risks for Elementary Data customers](#impact-and-risks-for-elementary-data-customers) * [How to protect against similar security incidents](#how-to-protect-against-similar-security-incidents) ## Key facts: Elementary Data data breach * Date reported April 28, 2026 * Target entity Elementary Data * Source of breach Script-injection vulnerability in GitHub Actions pipeline * Data types Developer secrets, cloud access tokens, cryptocurrency wallets * Status Confirmed; reported on April 28, 2026. * Severity High; supply chain compromise involving the theft of sensitive developer credentials and financial assets. ## What happened in the Elementary Data data breach? Elementary Data (elementary-data.com), a provider of data observability tools, was the target of a high-severity software supply chain attack reported on April 28, 2026. The incident involved the compromise of the popular Python package “elementary-data” on the Python Package Index (PyPI). Threat actors exploited a script-injection vulnerability within the project’s GitHub Actions pipeline, enabling them to forge a verified release commit. This allowed for the distribution of a malicious version, 0.23.3, which also poisoned Docker images on the GitHub Container Registry (GHCR). The malicious package was designed to activate immediately upon installation, targeting critical developer secrets such as cloud access tokens and cryptocurrency wallets. This high-severity incident highlights the risks of automated CI/CD pipelines. The breach specifically impacts users of version 0.23.3, while those on version 0.23.4 or 0.23.2 remain unaffected. Such attacks typically lead to further unauthorized access to cloud environments and potential financial loss. ## Who is behind the incident? The attacker or cause of the incident has not been identified. ## Impact and risks for Elementary Data customers The primary impact of this breach falls on developers and organizations using the compromised PyPI package or Docker images. The exposure of cloud access tokens could allow unauthorized third parties to access sensitive infrastructure, leading to data exfiltration or service disruption. Furthermore, the theft of cryptocurrency wallets poses a direct financial risk to affected individuals. Credential abuse is a significant concern, as stolen secrets can be used to pivot into other secure systems. Typical outcomes of supply chain attacks include long-term unauthorized access and secondary breaches. Affected users should immediately rotate all secrets, audit cloud access logs, and upgrade to version 0.23.4. Implementing strict dependency pinning and monitoring CI/CD pipelines for unusual activity can help mitigate these risks. Transparency regarding the vulnerability helps the broader community secure their software supply chains. ## How to protect against similar security incidents Following the supply chain attack on the Elementary Data PyPI package, developers should take immediate steps to secure their environments and rotate potentially compromised credentials. * **Update and verify package versions.** Immediately upgrade to version 0.23.4 or revert to 0.23.2. Audit all local and production environments for the presence of version 0.23.3. Check Docker images pulled from GHCR for potential poisoning. * **Rotate secrets and credentials.** Invalidate and replace all cloud access tokens and API keys used in environments where the malicious package was installed. Secure cryptocurrency wallets and move assets to new, uncompromised addresses. Change passwords for any services where credentials may have been stored in environment variables. * **Enhance CI/CD and supply chain security.** Implement strict script-injection protections in GitHub Actions and other CI/CD pipelines. Use dependency pinning and software bills of materials (SBOMs) to track package integrity. Deploy continuous attack surface management to detect unauthorized changes in your software supply chain. > Proactive monitoring and rapid response are essential to mitigating the impact of sophisticated supply chain compromises. ## Frequently asked questions ### What happened in the Elementary Data security breach? On April 28, 2026, Elementary Data (elementary-data.com) disclosed a security breach. According to initial reports, a software supply chain attack compromised the elementary-data PyPI package and associated Docker images via a GitHub Actions vulnerability, leading to the theft of developer credentials and secrets. ### When did the Elementary Data breach occur? The Elementary Data breach was publicly reported on April 28, 2026. The exact date of the attack has not been disclosed. ### What data was exposed? The types of data involved in the Elementary Data incident include developer secrets, cloud access tokens, and cryptocurrency wallet information. ### Is my personal information at risk? If you interacted with Elementary Data by installing version 0.23.3 of their Python package, there’s a possibility your personal information could be affected. Similar incidents often involve email addresses, login details, or financial records. Stay alert for updates and take precautionary measures to secure your accounts. ### What steps should companies take after being breached? Elementary Data is expected to secure its GitHub Actions pipelines, notify affected developers, and provide guidance on upgrading to safe package versions. Organizations should also review security measures and deploy attack surface management to prevent future supply chain vulnerabilities. ## Is your organization exposed to a similar risk? UpGuard continuously monitors vendors for exposed credentials and infrastructure risk, so you can catch the next breach before it becomes a headline. [Start your free trial](https://cyber-risk.upguard.com/register/trial) Free instant security score ## How secure is your organization? 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