CVE-2026-2772

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

Use-after-free vulnerability in the Audio/Video: Playback component of Firefox and Thunderbird. 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 crash, compromising user data confidentiality and integrity.

Recommendation

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

Original NVD description (English source)

Use-after-free in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.