Input validation error in Mozilla Firefox and Firefox for Android - CVE-2026-6780
Published: April 21, 2026
Vulnerability identifier: #VU126693
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-6780
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due an unspecified error in the Audio/Video: Playback component. A remote attacker can trick the victim into visiting a specially crafted web page and crash the browser.
Remediation
Install updates from vendor's website.