CVE-2025-11719 | Starting in Thunderbird 143, the use of the native messaging… | CVSS 9.8 CRITICAL

Description

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.

Metadata

CVE ID: CVE-2025-11719
State: PUBLISHED
Assigner: mozilla
Reserved: 2025-10-13 19:50 UTC
Published: 2025-10-14 12:27 UTC
Last updated: 2026-04-13 14:31 UTC
Primary CWE: CWE-416
CWE-416 Use After Free
Vendor / Product: Mozilla / Firefox
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (2)

Vendor	Product	Platform	Versions
Mozilla	Firefox	—	144 ≤ *
Mozilla	Thunderbird	—	144 ≤ *

Weakness (CWE)

CWE	Source	Description
CWE-416	adp	CWE-416 Use After Free

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (3)