CVE-2026-6780 — Uncontrolled Resource Consumption in Mozilla Firefox

CWE-400 — Uncontrolled Resource ConsumptionCWE-770 — Allocation of Resources Without Limits or Throttling6 documents5 sources
Severity
7.5HIGHNVD
EPSS
0.1%
top 83.81%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxMozilla Thunderbird
Timeline
PublishedApr 21

Description

Denial-of-service in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶Mozillamozilla/firefox< Firefox 150
▶Mozillamozilla/thunderbird< Thunderbird 150

🔴Vulnerability Details

1
GHSA
GHSA-47f5-x8gg-g88g: Denial-of-service in the Audio/Video: Playback component↗2026-04-21
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📋Vendor Advisories

3
Red Hat
firefox: Firefox: Denial of Service in Audio/Video Playback component↗2026-04-21
▶
Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6780↗
▶
Mozilla
Mozilla Foundation Security Advisory 2026-33: CVE-2026-6780↗
▶

💬Community

1
Bugzilla
CVE-2026-6780 firefox: Firefox: Denial of Service in Audio/Video Playback component↗2026-04-21
▶
CVE-2026-6780 — Uncontrolled Resource Consumption | cvebase