CVE-2026-45243
Summarize < 0.15.1 Browser Extension Missing Authorization via Content Script
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 18, 2026
- Updated
- Oct 8, 2026
- Reserved
- May 11, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
summarizesteipete |
|
References
- https://github.com/steipete/summarize/releases/tag/v0.15.2release-notes
- https://github.com/steipete/summarize/pull/222issue-tracking
- https://github.com/steipete/summarize/commit/357544063af535bd574752622f9eb94be33ee5fdpatch
- https://www.vulncheck.com/advisories/summarize-browser-extension-missing-authorization-via-content-scriptthird-party-advisory
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