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CVE PROGRAM SOURCE RECORD10.0 Critical

CVE-2026-4689

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component

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Status
Published
Published
Updated
Assigning organization
mozilla

Description

Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 115.34 to ≤ 115.*unaffected
  • 140.9 to ≤ 140.*unaffected
  • 149 to ≤ *unaffected

Mozilla Thunderbird

  • 140.9 to ≤ 140.*unaffected
  • 149 to ≤ *unaffected

References