CVE-2026-16366

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

Score

CVSS 3.1 8.8 High

Status

Modified - security@mozilla.org

Published

2026-07-21

Last modified

2026-10-24

Weaknesses

CWE-269

Affected products

• Firefox (Mozilla)
• Thunderbird (Mozilla)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2049181
• https://www.mozilla.org/security/advisories/mfsa2026-68/
• https://www.mozilla.org/security/advisories/mfsa2026-71/