In March 2024, a sophisticated supply chain attack was discovered in XZ Utils, a widely trusted package utilized in major Linux distributions, featuring malicious code that allowed unauthorized remote SSH access. This security breach, identified as CVE-2024-3094, affected specific versions 5.6.0 and 5.6.1, which contained a backdoor enabling attackers with a specific private key to execute arbitrary payloads before the SSH authentication step. The open-source community's vigilance quickly limited the impact, with stable Linux distributions remaining unaffected. The attacker, who had built a trusted reputation over years, used obfuscated code to evade detection. The breach shocked the open-source community, highlighting the need for enhanced scrutiny even for well-regarded projects. Various Linux distributions, including Fedora, Debian, and Alpine, issued updates to remediate the vulnerability, while platforms like JFrog provided tools for detecting and resolving the issue. Additionally, other projects associated with the attacker’s account are under investigation for potential vulnerabilities, underscoring the wide-reaching implications of this attack.