Anthropic Mythos AI Finds Rejetto HFS Flaw That Lets Attackers Forge Admin Sessions and Execute Code

Anthropic’s Mythos AI has identified a critical vulnerability in Rejetto HTTP File Server that could allow remote attackers to forge administrator sessions and execute arbitrary code. The issue, tracked as CVE-2026-61500, stems from predictable session-signing keys generated through JavaScript’s non-cryptographic Math.random() function. Horizon3 made the finding after joining Anthropic’s Project Glasswing in July 2026, which […]

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