PT-2026-33971

CVE-2026-6785

Published

2026-04-21

Updated

2026-07-25

Description by

CVSS 3.1

9.8

Critical

MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Firefox ESR version 115.34 Firefox ESR version 140.9 Thunderbird ESR version 140.9 Firefox version 149 Thunderbird version 149

Description Memory safety bugs involving memory corruption could allow an attacker to run arbitrary code.

Recommendations Update Firefox ESR 115.34 to version 115.35. Update Firefox ESR 140.9 to version 140.10. Update Thunderbird ESR 140.9 to version 140.10. Update Firefox 149 to version 150. Update Thunderbird 149 to version 150.

Exploitability

Fix

Impacts

Researchers

Andrew Mccreight

Ashley Zebrowski

Brian

Vendors

Affected products

Weakness enumeration

CWE-787: Out-of-bounds Write

CWE-416: Use After Free