VDB
DEBIAN-CVE-2026-2777
DEBIAN-CVE-2026-2777
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Privilege escalation in the Messaging System component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
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 | 140.8.0, 140.7.0, 140.7.0 |
| Debian:12 | thunderbird | 128.4.0, 128.4.2, 128.4.3 |
| Debian:14 | thunderbird | 140.8.0, 140.8.0, 140.8.0 |
| Debian:11 | firefox-esr | 102.6.0, 102.6.0, 102.7.0 |
| Debian:14 | firefox-esr | 140.4.0, 140.5.0, 140.5.0 |
| Debian:13 | firefox-esr | 140.4.0esr-1, 140.3.1esr-2, 140.3.1esr-1~deb13u1 |
| Debian:11 | thunderbird | 0, 102.12.0-1, 102.12.0-1 |
| Debian:13 | thunderbird | 140.8.0, 140.8.0, 140.7.1 |
Exploit Intelligence
- mfsa2026-15.yml (github-poc)
Timeline
- Feb 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated