VDB
DEBIAN-CVE-2026-2783
DEBIAN-CVE-2026-2783
PUBLISHED
CVSS 7.5 HIGH
Information disclosure due to JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Risk Scores
CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | firefox-esr | 140.4.0, 140.4.0, 140.4.0 |
| Debian:13 | thunderbird | 140.5.0, 140.5.0, 140.6.0 |
| Debian:12 | firefox-esr | *, *, * |
| Debian:13 | firefox-esr | 0, 140.8.0, 140.8.0 |
| Debian:14 | thunderbird | 140.4.0, 140.5.0, 140.5.0 |
| Debian:11 | firefox-esr | 115.9.1esr-1, 0, 102.1.0esr-2 |
| Debian:11 | thunderbird | 1:115.5.0-1~deb12u1, 1:115.5.0-1~deb10u1, 1:115.5.0-1 |
| Debian:12 | thunderbird | 1:128.3.2esr-1, 1:128.3.0esr-1, 1:128.2.3esr-1 |
Exploit Intelligence
- mfsa2026-15.yml (github-poc)
- poc.js (github-poc)
Timeline
- Feb 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated