Integer overflow in Mozilla products - CVE-2026-2781
Published: February 24, 2026 / Updated: April 21, 2026
Vulnerability identifier: #VU123207
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-2781
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Firefox for Android
Mozilla Firefox
Firefox ESR
Firefox for Android
Detailed vulnerability description
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to integer overflow in the Libraries component in NSS. A remote attacker can trick the victim into visiting a specially crafted website, trigger an integer overflow and crash the browser.
How to mitigate CVE-2026-2781
Install updates from vendor's website.