CVE-2026-16361 [CRITICAL] – Memory safety bugs present in Thunderbird ESR 140.12. Some of these bugs showed evidence o

Memory safety bugs present in Thunderbird ESR 140.12. 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 ESR 115.38, Firefox ESR 140.13, and Thunderbird 140.13.