🔐 CVE Alert

CVE-2026-100811

CRITICAL 9.6

Sandbox escape due to use-after-free in the DOM: Core & HTML component

CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th

Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, and Firefox ESR 140.17.

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published Sep 29, 2026
Last Updated Sep 29, 2026
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Affected Versions

Mozilla / Firefox
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2067973 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-100/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-97/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-99/

Credits

Yaqoub Aldurayhim