CVE-2026-12297

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 152 Firefox ESR versions prior to 140.12 Firefox ESR versions prior to 115.37 Thunderbird versions prior to 152 Thunderbird versions prior to 140.12

Description A sandbox escape exists due to incorrect boundary conditions within the Networking component. A sandbox is a security mechanism used to separate running programs from the rest of the system to prevent malicious code from accessing sensitive data or resources.

Recommendations Update Firefox to version 152. Update Firefox ESR to version 140.12. Update Firefox ESR to version 115.37. Update Thunderbird to version 152. Update Thunderbird to version 140.12.