What is CVE-2026-45243?

CVE-2026-45243 is a medium-severity vulnerability in Steipete Summarize, classified under Missing Authorization. CVSS score: 6.1/10. Published 2026-05-18.

How severe is CVE-2026-45243?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Auth bypass in Steipete Summarize

CVE-2026-45243

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…

Vulnerability class: Broken Access Control

EPSS: 0.000 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Steipete Summarize — versions 0, 357544063af535bd574752622f9eb94be33ee5fd

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (release-notes, Release Notes)
disclosure@vulncheck.com (issue-tracking, Exploit, Patch, Issue Tracking)
disclosure@vulncheck.com (Patch, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-45243?: CVE-2026-45243 is a medium-severity vulnerability in Steipete Summarize, classified under Missing Authorization. CVSS score: 6.1/10. Published 2026-05-18.
How severe is CVE-2026-45243?: Medium severity. CVSS v3 base score is 6.1 out of 10.