CVE-2026-74944

CriticalCVSS 9.8

Published: 18/08/2026(UTC)Updated: 20/08/2026(UTC)Translated: 19/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.16%

5th percentile - higher than 5% of all known CVEs

Summary

Use-after-free vulnerability in the DOM: Core & HTML component. The flaw was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, and Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Risk Assessment

Use-after-free could lead to browser crashes or potentially arbitrary code execution, posing a serious security risk.

Recommendation

Update Firefox or Thunderbird to the patched version immediately.

Original NVD description (English source)

Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.