CVE-2026-2770

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

0.47%

37th percentile - higher than 37% of all known CVEs

Summary

A use-after-free vulnerability was found in the DOM: Bindings (WebIDL) component, potentially allowing remote code execution. The flaw is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Risk Assessment

An attacker could exploit this vulnerability to take control of the victim's system via a crafted web page or email message.

Recommendation

Immediately update Firefox browsers and Thunderbird clients to the versions specified in the description (Firefox 148, Firefox ESR 115.33/140.8, Thunderbird 148/140.8).

Original NVD description (English source)

Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.