Review reviewCritical
CVE-2026-16406
Mozilla Firefox, Thunderbird, firefox
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
- CVSS
- 9.1
- EPSS
- 0.24% 15.9% percentile
- CISA KEV
- Not listed
- Published
- 2026.07.21