CVE-2026-8879

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Summary

CVECVE-2026-8879
StatePUBLISHED
Assignercertcc
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-03 19:16:39 UTC
Updated2026-06-03 19:16:39 UTC
DescriptionVersion 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.

Risk And Classification

Problem Types: CWE-829 Inclusion of Functionality from Untrusted Control Sphere

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Securly Securly Chrome Extension affected 3.0.7 custom Not specified

References

ReferenceSourceLinkTags
kb.cert.org/vuls/id/595768 [email protected] kb.cert.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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