Review reviewCritical
CVE-2026-16389
Mozilla Firefox, Thunderbird, firefox
Incorrect boundary conditions, integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
- CVSS
- 9.8
- EPSS
- 0.42% 34.8% percentile
- CISA KEV
- Not listed
- Published
- 2026.07.21