CVE-2026-2770

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

Use-after-free vulnerability in the DOM: Bindings (WebIDL) component. 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 execute arbitrary code or cause a denial of service, posing a significant risk to system confidentiality and availability.

Recommendation

Immediately update Firefox to version 148 or later, or ESR versions 115.33/140.8. Update Thunderbird to version 148 or 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.