CVE-2026-74967

MediumCVSS 5.4

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

Exploitation Probability (EPSS)

Low risk

0.14%

4th percentile - higher than 4% of all known CVEs

Summary

Vulnerability in the Audio/Video: Playback component allows bypassing the same-origin policy. It was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Risk Assessment

Bypassing the same-origin policy could allow an attacker to access resources from other domains, potentially leading to data theft or unauthorized actions.

Recommendation

Update Firefox or Thunderbird to the latest available version that includes the fix.

Original NVD description (English source)

Same-origin policy bypass in the Audio/Video: Playback 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.