🔐 CVE Alert

CVE-2026-109707

CRITICAL 9.6

Sandbox escape due to use-after-free in the Networking component

CVSS Score
9.6
EPSS Score
0.0%
EPSS Percentile
0th

Sandbox escape due to use-after-free in the Networking component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published Oct 13, 2026
Last Updated Oct 13, 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=2059150 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-106/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-108/

Credits

Mozilla