CVE-2026-45243

MEDIUM EPSS 9.4%
Published May 18, 20261mo ago · Modified Jun 17, 20262w ago
5.3 CVSS 4.0
Medium
Find Similar
Published May 18, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction P
Scope X

Threat Intelligence

EPSS Exploit Probability
9.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
steipetesummarize* <0.15.1

References 4

  • github.com https://github.com/steipete/summarize/commit/357544063af535bd574752622f9eb94be33ee5fd
    Patch
  • github.com https://github.com/steipete/summarize/pull/222
    ExploitIssue TrackingPatch
  • github.com https://github.com/steipete/summarize/releases/tag/v0.15.2
    Release Notes
  • vulncheck.com https://www.vulncheck.com/advisories/summarize-browser-extension-missing-authorization-via-content-script
    Third Party Advisory

Remediation

  • github.com https://github.com/steipete/summarize/commit/357544063af535bd574752622f9eb94be33ee5fd
    Patch
  • github.com https://github.com/steipete/summarize/pull/222
    ExploitIssue TrackingPatch