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9.8 Critical

CVE-2026-16360 Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 152

Description

Memory safety bugs present in Thunderbird ESR 140.12 and Thunderbird 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 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Affected products and versions

Product Affected versions Fixed in
Firefox 153 earliest → < 153 153
Firefox 140.13 earliest → < 140.13 140.13
Firefox 115.38 earliest → < 115.38 115.38
Thunderbird 153 earliest → < 153 153
Thunderbird 140.13 earliest → < 140.13 140.13

References

Timeline

  1. Published
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