Threats affecting pkg:github/progressiverobot/hmailserver

CVE-2026-100741 is a critical eval injection vulnerability in Progressive Robot Ltd's hMailServer versions 6.0.0 through 6.3.3 on Windows. It allows a remote unauthenticated attacker to execute arbitrary JScript code with service account privileges via crafted passwords or certain message fields when event scripting is enabled with JScript and specific event handlers are defined. The vulnerability does not affect VBScript event scripts or Linux builds. Exploitation requires non-default configurations enabling JScript event scripting and relevant handlers.