Debian/thunderbird: high 8.6
Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140
Action: Upgrade thunderbird to 1:140.9.0esr-1~deb12u1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:140.9.0esr-1~deb12u1 | - |
Fixed versions
| 1:140.9.0esr-1~deb12u1 |
Sources
- osv: DEBIAN-CVE-2026-4687#Debian:12/thunderbird
- https://security-tracker.debian.org/tracker/CVE-2026-4687
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