CVE-2026-2762

CriticalCVSS 9.8

Published: 24/02/2026(UTC)Updated: 30/06/2026(UTC)Translated: 01/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.54%

41th percentile - higher than 41% of all known CVEs

Summary

An integer overflow was found in the JavaScript: Standard Library component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Risk Assessment

An attacker could exploit this vulnerability to execute arbitrary code remotely or cause a denial of service, compromising system confidentiality and availability.

Recommendation

Immediately update Firefox to version 148 or later and Thunderbird to version 148 or 140.8.

Original NVD description (English source)

Integer overflow in the JavaScript: Standard Library component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.