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9.8 Critical

CVE-2026-16361 Memory safety bugs present in Thunderbird ESR 140.12

Description

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.

Affected products and versions

Product Affected versions Fixed in
Firefox 140.13 earliest → < 140.13 140.13
Firefox 115.38 earliest → < 115.38 115.38
Thunderbird 140.13 earliest → < 140.13 140.13

References

Timeline

  1. Published
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