CVE-2026-2764

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

0.47%

38th percentile - higher than 38% of all known CVEs

Summary

A vulnerability in the JavaScript engine's JIT component causes a miscompilation and use-after-free issue. It was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Risk Assessment

An attacker can remotely exploit this flaw to execute arbitrary code on the victim's system, potentially leading to full compromise or data theft.

Recommendation

Immediately update Firefox and Thunderbird to the latest versions (Firefox 148, Firefox ESR 115.33/140.8, Thunderbird 148/140.8).

Original NVD description (English source)

JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.