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Zammad CVE-2026-102489: Session Leak to RCE

calendar_today October 7, 2026 person Zach Hanley domain horizon3ai

Horizon3 reverse engineered CVE-2026-102489 in Zammad, reproduced the unauthenticated WebSocket session leak, traced the vulnerable code path, and demonstrated how a leaked admin session can lead to remote code execution.

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