CVE-2026-6747

Use-after-free in the WebRTC component

High · published April 21, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
46.9
In the wild
Unconfirmed
What it is

Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00579 · 46.9th percentile
Published
2026-04-21T12:40Z
EPSS history
Timeline
  • 21 APR 12:40Z
    Use-after-free in the WebRTC component
    cvelistv5