VDB
DEBIAN-CVE-2026-4702
DEBIAN-CVE-2026-4702
PUBLISHED
CVSS 9.800000190734863 CRITICAL
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in 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:12 | firefox-esr | 102.15.1, 128.7.0, 128.6.0 |
| Debian:14 | thunderbird | 132.0, 130.0, 129.0 |
| Debian:12 | thunderbird | 1:102.12.0-1~deb11u1, 1:102.12.0-1~deb12u1, 1:102.13.0-1 |
| Debian:13 | thunderbird | 140.9.0, 140.9.0, 140.8.0 |
| Debian:11 | thunderbird | 140.5.0, 140.5.0, 140.5.0 |
| Debian:13 | firefox-esr | 140.4.0, 140.4.0, 140.4.0 |
| Debian:11 | firefox-esr | 115.14.0, 115.15.0, 115.15.0 |
| Debian:14 | firefox-esr | 0, 128.13.0esr-1, 128.14.0esr-1 |
Exploit Intelligence
- meta.json (github-poc)
- mfsa2026-23.yml (github-poc)
- 2026.xml (github-poc)
- poc.js (github-poc)
Timeline
- Mar 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated