CVE-2026-100771

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 157 Firefox ESR versions prior to 115.42 Firefox ESR versions prior to 140.17 Firefox ESR versions prior to 153.4 Thunderbird versions prior to 157

Description Undefined behavior exists within the DOM: Streams component, which handles the streaming of data in the browser environment.

Recommendations Update Firefox to version 157. Update Firefox ESR to version 115.42. Update Firefox ESR to version 140.17. Update Firefox ESR to version 153.4. Update Thunderbird to version 157.