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CVE-2026-45243— Summarize < 0.15.1 Browser Extension Missing Authorization via Content Script

Quick assessment

Affected
steipete summarize
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Summarize是Peter Steinberger个人开发者的一款支持多来源的快速摘要工具。 Summarize 0.15.1之前版本存在安全漏洞，该漏洞源于内容脚本window.postMessage桥接中的授权缺失问题，可能导致恶意页面执行自动化工件上的未授权操作。攻击者可以模拟带有伪造发送者标识符的运行时消息，列出、读取、创建、覆盖或删除受影响标签范围内的自动化工件。

CVSS 6.1 · Medium EPSS 0.33% · P24

Affected Version Matrix 2

VendorProduct Version RangeStatus
steipete summarize < 0.15.1 affected
357544063af535bd574752622f9eb94be33ee5fd unaffected
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I. Basic Information for CVE-2026-45243

Vulnerability Information
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Vulnerability Title
Summarize < 0.15.1 Browser Extension Missing Authorization via Content Script
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Summarize 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Summarize是Peter Steinberger个人开发者的一款支持多来源的快速摘要工具。 Summarize 0.15.1之前版本存在安全漏洞，该漏洞源于内容脚本window.postMessage桥接中的授权缺失问题，可能导致恶意页面执行自动化工件上的未授权操作。攻击者可以模拟带有伪造发送者标识符的运行时消息，列出、读取、创建、覆盖或删除受影响标签范围内的自动化工件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
steipete summarize 0 ~ 0.15.1 -

II. Public POCs for CVE-2026-45243

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III. Intelligence Information for CVE-2026-45243

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Patches & Fixes for CVE-2026-45243 (2)

Vendor Advisories for CVE-2026-45243 (1)

Vendor Pages for CVE-2026-45243 (1)

Same Patch Batch · steipete · 2026-05-18 · 5 CVEs total

CVE-2026-45245 7.4 HIGH Summarize < 0.15.1 Unauthorized Daemon Request via Untrusted Events
CVE-2026-45242 7.1 HIGH Summarize < 0.15.1 Path Traversal via slidesDir Parameter
CVE-2026-45246 5.5 MEDIUM Summarize < 0.15.1 Insecure File Permissions Information Disclosure
CVE-2026-45244 5.4 MEDIUM Summarize < 0.15.1 Unapproved Browser Automation Execution

IV. Related Vulnerabilities

Same product: summarize
Same vendor: steipete
Same weakness: CWE-862

V. Comments for CVE-2026-45243

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