CVE-2026-2793
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Memory safety bugs were found in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147, and Thunderbird 147. Some of these bugs caused memory corruption, which could potentially allow arbitrary code execution.
Risk Assessment
The risk involves potential remote code execution by an attacker, which could lead to system compromise and data theft.
Recommendation
Immediately update Firefox and Thunderbird to version 148, and ESR versions to 115.33 or 140.8 to remediate the vulnerability.
Original NVD description (English source)
Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.