VDB
DEBIAN-CVE-2026-4711
DEBIAN-CVE-2026-4711
REJECTED
CVSS 9.800000190734863 CRITICAL
Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Risk Scores
CVSS 3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | firefox-esr | 140.3.0, 0, 128.13.0esr-1 |
| Debian:14 | firefox-esr | 140.3.1esr-1, 0, 140.3.1 |
| Debian:12 | firefox-esr | 128.7.0, 128.7.0, 128.7.0 |
| Debian:11 | thunderbird | 128.14.0, 128.14.0, 128.14.0 |
| Debian:14 | thunderbird | 1:137.0-1, 148.0.1-1, 144.0.1-1 |
| Debian:13 | thunderbird | 1:140.2.0esr-1, *, 1:128.14.0esr-1 |
| Debian:12 | thunderbird | 0, 148.0.1-1, 144.0.1-1 |
| Debian:11 | firefox-esr | 128.5.0, 128.5.1, 128.6.0 |
Exploit Intelligence
- mfsa2026-23.yml (github-poc)
- 2026.xml (github-poc)
- _18a_browser_cves_data.py (github-poc)
Timeline
- Mar 25, 2026 CVE Rejected