Buffer overflow in Mozilla products - CVE-2026-84144
Published: September 1, 2026
Vulnerability identifier: #VU146625
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84144
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to memory corruption in multiple unspecified components when processing crafted web content. A remote attacker can trigger the vulnerable behavior to execute arbitrary code.
The advisory states that some internally found bugs showed evidence of memory corruption or another security-relevant defect.
Affected software
Firefox for Android
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
How to mitigate CVE-2026-84144
Install security update from vendor's website.
Firefox for Android - update to 155.0
Mozilla Firefox - update to 155.0
Firefox ESR - update to 153.2.0
Mozilla Firefox - update to 155.0
Firefox ESR - update to 153.2.0