CVE-2026-8879 CVE-2026-8879
The extension dynamically loads unreviewed scripts that can hide page content indefinitely if servers are unreachable, causing denial of service and bypassing security reviews.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-8879?
CVE-2026-8879 is a high-severity vulnerability in Securly Chrome Extension, published on 3 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-829
Which versions are affected by CVE-2026-8879?
It affects 1 product.
Products include Securly Securly.
How do I fix CVE-2026-8879?
No fix has been published for CVE-2026-8879 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-8879 being exploited?
There is no known exploitation of CVE-2026-8879 in the wild and no public exploit code.
Other vulnerabilities in Securly Chrome Extension
Sources
Also known as GHSA-jg8r-xqh5-556r.