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TI-2026-07801 Aliases CVE-2026-8879GHSA-jg8r-xqh5-556r

Version 3.0.7 of the Securly Chrome Extension dynamically registers content13.min.js as a…

Priority LOW 39CWE-829Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-829.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00374 31st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SecurlySecurly Chrome Extensionup to 3.0.7—No fix listedCNA
  • Securly Chrome Extension VendorSecurly Affected up to 3.0.7 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:securly:securly:3.0.7:*:*:*:*:chrome:*:*3.0.7VulnerableSecurly
  • cpe:2.3:a:securly:securly:3.0.7:*:*:*:*:chrome:*:* Versions 3.0.7 Vulnerable ·Securly

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-8879
  2. 2026-10-03 Alias added: GHSA-jg8r-xqh5-556r

References

Advisory 1

  • TI-2026-07798 Hard-coded credentials in Securly Chrome Extension CVSS 3.1HIGH 7.3
  • TI-2026-07810 Regular expression denial of service in Securly Chrome Extension CVSS 3.1HIGH 7.5
  • TI-2026-07811 Version 3.0.7 of the Securly Chrome Extension uses deprecated SHA-1 hashing for IWF CSAM… CVSS 3.1HIGH 7.5
  • TI-2026-07803 Version 3.0.7 of the Securly Chrome Extension uses EVP_BytesToKey key derivation with MD5… CVSS 3.1HIGH 7.5
  • TI-2026-07800 Version 3.0.7 of the Securly Chrome Extension exposes multiple publicly accessible… CVSS 3.1HIGH 7.5
  • TI-2026-07796 Cleartext transmission of sensitive information in Securly Chrome Extension CVSS 3.1HIGH 7.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences