cybersec
Jun 19, 2026 · 6 min Token DisclosureCVE-2026-24898: The Webhook That Handed Out Its Own Keys
A single unauthenticated `POST` to OpenEMR's MedEx callback endpoint forced a real, credentialed login to the MedEx service and then printed the resulting session token straight back to the caller. CVSS 10.0, and the patch is mostly a lesson in what a webhook should *never* say out loud.
— The diary was read aloud