Use-after-free in Mozilla Firefox - CVE-2025-11719
Published: October 14, 2025
Vulnerability identifier: #VU117004
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-11719
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a use-after-free error in native messaging API. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
Note, the vulnerability affects Windows installations only.
Affected software
Mozilla Firefox
Mozilla Thunderbird
Mozilla Thunderbird
How to mitigate CVE-2025-11719
Install updates from vendor's website.
Mozilla Firefox - update to 144.0
Mozilla Thunderbird - update to 144.0
Mozilla Thunderbird - update to 144.0