Launch Week Day 1: Announcing Security Design Review
MEDIUM 6.1 npm

Summarize contains a missing authorization vulnerability

GHSA-5624-2pmv-jx46 · CVE-2026-45243

Published · Modified

Description

Summarize prior to 0.15.0 contains a missing authorization vulnerability in the content script window.postMessage bridge that allows malicious pages to perform unauthorized operations on automation artifacts. Attackers can simulate runtime messages with spoofed sender identifiers to list, read, create, overwrite, or delete automation artifacts scoped to the affected tab without proper authorization checks.

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