VDB
DEBIAN-CVE-2026-2776
DEBIAN-CVE-2026-2776
PUBLISHED
CVSS 10 CRITICAL
Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. 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
10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:13 | thunderbird | 1:128.14.0esr-1, 1:128.14.0esr-1~deb11u1, 1:128.14.0esr-1~deb12u1 |
| Debian:12 | thunderbird | *, *, * |
| Debian:14 | thunderbird | 1:128.14.0esr-1~deb11u1, 1:128.14.0esr-1, 1:128.13.0esr-1 |
| Debian:12 | firefox-esr | 140.8.0, 0, 102.12.0esr-1~deb10u1 |
| Debian:11 | thunderbird | 129.0, 130.0, 132.0 |
| Debian:14 | firefox-esr | 140.8.0, 128.13.0, 128.14.0 |
| Debian:13 | firefox-esr | 128.14.0esr-1, 128.14.0esr-1~deb11u1, 128.14.0esr-1~deb12u1 |
| Debian:11 | firefox-esr | 128.4.0, 128.4.0, 128.5.0 |
Exploit Intelligence
- mfsa2026-15.yml (github-poc)
Timeline
- Feb 24, 2026 CVE Published
- Apr 28, 2026 CVE Updated