CVE-2026-45243

Medium

Description

Summarize prior to 0.15.1 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.

SeverityMedium

CVSS6.1

Exploit probability—

ProductSteipete Summarize

PublishedMay 18, 2026

First seenMay 18, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

steipete summarize0.15.1 or later
@steipete/summarize0.15.0 or later

Patches

github.com/steipete/summarize/commit/357544063af535bd574752622f9eb94be33ee5fd

Vendor advisories

github.com/steipete/summarize/releases/tag/v0.15.2

Affected products

Product	Affected versions	Fixed in
steipete summarize	v < 0.15.1	0.15.1
@steipete/summarizenpm	v < 0.15.0	0.15.0

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