🔐 CVE Alert

CVE-2026-16401

HIGH 8.8

Privilege escalation in the Data Loss Prevention component

CVSS Score
8.8
EPSS Score
0.3%
EPSS Percentile
22th

Privilege escalation in the Data Loss Prevention 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=2052565 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-68/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-71/

Credits

Brian Carpenter