CVE-2025-11719
CRITICALFirefox and Thunderbird 143.0-143.x - Use-After-Free via Native Messaging API
Title source: llmDescription
Starting in Thunderbird 143, the use of the native messaging API by web extensions on Windows could lead to crashes caused by use-after-free memory corruption. This vulnerability was fixed in Firefox 144 and Thunderbird 144.
References (3)
Core 3
Core References
Issue Tracking, Permissions Required
https://bugzilla.mozilla.org/show_bug.cgi?id=1991950
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-81/
Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-84/
Scores
CVSS v3
9.8
EPSS
0.0007
EPSS Percentile
20.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (4)
mozilla/firefox
143.0 - 144.0
Mozilla/Firefox
144
mozilla/thunderbird
143.0 - 144.0
Mozilla/Thunderbird
144
Published
Oct 14, 2025
Tracked Since
Feb 18, 2026