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.

References

https://www.vulncheck.com/advisories/summarize-browser-extension-missing-authorization-via-content-script

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

https://github.com/steipete/summarize/pull/222

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

Details

Source: Mitre, NVD

Published: 2026-05-18

Updated: 2026-05-19

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

CVSS v4

Base Score: 5.3

Vector: 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

Severity: Medium