CVE-2026-2767

CriticalCVSS 9.8

Published: 24/02/2026(UTC)Updated: 15/07/2026(UTC)Translated: 16/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.38%

31th percentile - higher than 31% of all known CVEs

Summary

A use-after-free vulnerability was found in the JavaScript: WebAssembly component, 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 or cause a crash, posing a serious risk to system confidentiality and availability.

Recommendation

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

Original NVD description (English source)

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.