Emerging Threat: (CVE-2026-72766) n8n Arbitrary File Read and SSRF via Send Email Node
CVE-2026-72766 is a type confusion vulnerability in the Send Email node of n8n, an open-source workflow automation platform. The node does not enforce that its message fields hold string values, so a non-string value arriving from a workflow expression can be passed through to the underlying mail library, Nodemailer, which interprets it as a file path or a URL rather than message text. The vulnerability carries a CVSS v3.1 base score of 7.5 (High). Under CVSS v4.0 it scores 8.2 (High).