Launch Week Day 1: Announcing Security Design Review
HIGH 7.4 npm

Summarize's hover summary feature allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links

GHSA-2r69-qgv3-hr65 · CVE-2026-45245

Published · Modified

Description

Summarize prior to 0.15.0 contains a vulnerability in the hover summary feature that allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links, causing the extension to make authenticated daemon requests using stored tokens without verifying event trustworthiness. Attackers can place local or private-network URLs behind hoverable links to route authenticated requests through the daemon, potentially accessing sensitive internal endpoints when users interact with attacker-controlled content.

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