High 7.5Published Jun 3, 2026

CVE-2026-8879CVE-2026-8879

Updated under an hour ago (Oct 26, 2026, 12:00 PM ET)

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It affects Securly Chrome Extension and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Securly Chrome Extension

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-829
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: certcc
NVD analysis: Analyzed
Record last updated: Jun 4, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Securly Securly Chrome Extension securly:chrome_extension (from the name)	through 3.0.7	CNA record
securly securly securly:securly	3.0.7	NVD

References

https://kb.cert.org/vuls/id/595768third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.