CVE-2019-11716: Mozilla Firefox vulnerability

CVE-2019-11716: Until explicitly accessed by script, window.globalThis is not enumerable and, as a result, is not visible t...

Until explicitly accessed by script, window.globalThis is not enumerable and, as a result, is not visible to code such as Object.getOwnPropertyNames(window). Sites that deploy a sandboxing that depends on enumerating and freezing access to the window object may miss this, allowing their sandboxes to be bypassed. This vulnerability affects Firefox < 68.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 4, 2024, 23:03 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old Firefox sandbox bypass issue. Before Firefox 68, window.globalThis could be missed by code that enumerated and froze window properties. Websites or applications relying on that pattern for JavaScript sandboxing could have had their sandbox assumptions bypassed. Exposure is most likely where Firefox versions earlier than 68 remain in use, including unmanaged endpoints, legacy Linux packages, or browser-based test and automation environments. Risk is narrower for organizations that do not rely on affected JavaScript sandboxing patterns. Treat as a legacy browser hygiene issue with targeted risk. Prioritize remediation if old Firefox builds remain in production, developer, kiosk, or automation environments, especially where browser-side sandboxing matters. Mitigation focus: Upgrade Firefox to version 68 or later.; Remove Firefox versions earlier than 68 from managed systems.; Review Mozilla and distribution advisories for package-specific remediation..

Prepared: Jun 6, 2026, 14:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 23, 2019, 13:18 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.mozilla.org/security/advisories/mfsa2019-21/CVE reference · x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1552632CVE reference · x_refsource_MISC
GLSA-201908-12CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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