CVE-2026-16412
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
Memory safety bugs in Firefox ESR 140.12 and Firefox 152 could lead to memory corruption and potentially remote code execution. Patches are available in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Risk Assessment
The risk is high – an attacker could exploit these bugs to execute arbitrary code in the browser context, potentially leading to system compromise.
Recommendation
Immediately update Firefox to version 153 or Firefox ESR to 140.13, and Thunderbird to version 153 or 140.13.
Original NVD description (English source)
Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.