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9.6 Critical

CVE-2026-100794 Sandbox escape due to incorrect boundary conditions in the Internationalization component

Description

Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

Affected products and versions

Product Affected versions Fixed in
Firefox 157 earliest → < 157 157
Firefox 153.4 earliest → < 153.4 153.4
Firefox 140.17 earliest → < 140.17 140.17
Thunderbird 157 earliest → < 157 157
Thunderbird 153.4 earliest → < 153.4 153.4
Thunderbird 140.17 earliest → < 140.17 140.17

References

Timeline

  1. Published
  2. Last modified

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