🔐 CVE Alert

CVE-2026-16366

HIGH 8.8

Privilege escalation in the DOM: Navigation component

CVSS Score
8.8
EPSS Score
0.4%
EPSS Percentile
30th

Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Vendor mozilla
Product firefox
Ecosystems
Industries
Technology
Published Jul 21, 2026
Last Updated Jul 24, 2026
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Affected Versions

Mozilla / Firefox
All versions affected
Mozilla / Thunderbird
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2049181 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-68/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-71/

Credits

Khanh Nguyen