Integer overflow in Mozilla products - CVE-2026-109730
Published: October 16, 2026
Vulnerability identifier: #VU155992
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-109730
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to potentially cause a denial of service through incorrect graphics calculations.
The vulnerability exists due to integer overflow in the Graphics component when performing calculations during graphics processing. A remote attacker can supply crafted graphics content that causes an integer calculation to exceed its representable range to potentially disrupt browser operation.
Affected software
Mozilla Firefox
Firefox ESR
Firefox for Android
Debian Linux
firefox-esr (Debian package)
Firefox ESR
Firefox for Android
Debian Linux
firefox-esr (Debian package)
How to mitigate CVE-2026-109730
Install security update from vendor's website.
Mozilla Firefox - update to 158.0
Firefox for Android - update to 158.0
Firefox ESR - addressed in versions 115.43.0, 153.5.0
firefox-esr (Debian package) - update to 153.5.0esr-1~deb13u1
Firefox for Android - update to 158.0
Firefox ESR - addressed in versions 115.43.0, 153.5.0
firefox-esr (Debian package) - update to 153.5.0esr-1~deb13u1