CVE-2026-12319 is a denial-of-service vulnerability affecting the Audio/Video playback component in Mozilla Firefox. It was fixed in Firefox 152 as part of a security update that addressed numerous vulnerabilities across various components, including memory safety bugs, sandbox escapes, and privilege escalations. The vendor advisory confirms the fix was included in Firefox 152, indicating that versions prior to 152 are affected. No CVSS score is provided, but the impact is classified as low by Mozilla. There are no known exploits in the wild for this vulnerability.

The vulnerability allows an attacker to cause a denial-of-service condition in the Audio/Video playback component of Firefox, potentially disrupting normal browser operation. According to the Mozilla advisory, the impact is considered low. There is no indication of code execution or data compromise from this specific issue. No active exploitation has been reported.

Mozilla fixed this vulnerability in Firefox 152. Users and administrators should update to Firefox 152 or later to remediate this issue. Since the fix is officially released, applying the update fully mitigates the vulnerability. No additional mitigation steps are indicated by the vendor advisory.