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.
Published: 2026-06-03
Score: n/a
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories

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References
Link Providers
https://kb.cert.org/vuls/id/595768 cve-icon cve-icon
History

Wed, 03 Jun 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title CVE-2026-8879
References

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-06-03T18:11:04.269Z

Reserved: 2026-05-18T20:29:18.234Z

Link: CVE-2026-8879

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-03T19:16:39.513

Modified: 2026-06-03T19:16:39.513

Link: CVE-2026-8879

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.