VDB
CVE-2026-8879
CVE-2026-8879
PUBLISHED
CVSS 7.5 HIGH
Reported by certcc · Published June 3, 2026
Version 3.0.7 of the Securly Chrome Extension dynamically registers content13.min.js as a content script via chrome.scripting.registerContentScripts() at runtime. This script is NOT declared in manifest.json and bypasses Chrome Web Store static security review. It runs on all URLs and immediately hides all page content, creates a full-page overlay, pauses all videos, and only restores content when the service worker confirms the page passes filtering. If Securly's servers are unreachable, pages remain indefinitely hidden.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Securly | Securly Chrome Extension | 0 |
| Securly | Securly Chrome Extension | 0 |
Timeline
- Jun 3, 2026 CVE Published
- Jun 4, 2026 Coalition ESS Score
- Jun 4, 2026 CVE Updated
- Jun 5, 2026 EPSS Score
- Jun 10, 2026 Security Advisory