Techzine.Eu Critical Ni8mare Vulnerability in n8n Servers Exposes Thousands to Remote Code Execution
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A critical vulnerability, tracked as CVE-2026-21858, has been discovered in the n8n workflow automation platform, allowing unauthenticated attackers to execute arbitrary commands and potentially take over an estimated 100,000 servers worldwide. The flaw carries a maximum CVSS score of 10.0, and a proof-of-concept exploit has been released, putting numerous hosts at risk.
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Critical Ni8mare CVE-2026-21858 Flaw in n8n Allows Full Server Takeover A critical vulnerability, Ni8mare (CVE-2026-21858), has been discovered in older n8n installations, allowing remote, unauthenticated attackers to exploit a webhook and access any file on the server, including sensitive data like API keys and credentials. This flaw has a CVSS score of 10.0, indicating its severe… 
China-Linked Hackers Exploit PHP2Shell to Root 25 Servers Cybersecurity firm Dream reported that a China-linked threat actor exploited PHP2Shell vulnerabilities (CVE-2026-109618 and CVE-2026-109619) and a Linux kernel privilege escalation flaw (CVE-2026-46300) to gain root access to 25 servers, including three in a U.S. government-affiliated environment. The attackers used…