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phoenixframework CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

MEDIUM phoenixframework CVE published 2026-07-07

CVE-2026-56812

CVE-2026-56812 is an Improper Check for Unusual or Exceptional Conditions vulnerability in the Phoenix JavaScript presence client. An attacker with ordinary channel access can cause a persistent client-side denial of service against every viewer of a presence channel topic. The vulnerability is due to a bare truthiness test (state[key]) instead of an own-property check, allowing an attacker to control pre [truncated]