CVE-2026-8879
CVE-2026-8879

Currently unrated

Key Information:

Vendor

Securly

Status
Securly Chrome Extension
Vendor
CVE Published:
3 June 2026

What is CVE-2026-8879?

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.

Affected Version(s)

Securly Chrome Extension 0 <= 3.0.7

References

https://kb.cert.org/vuls/id/595768

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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